pmacs/docs/active-work.md

Active work — cross-machine resume ledger

Snapshot: 2026-08-01. This file records volatile work that has not landed on main. Read it after docs/agent-handoff.md. Remove completed entries when their PR merges; do not let this become a second permanent backlog.

Updated 2026-08-11, second pass — the file-watcher arc is DONE. #235 merged (main @ 122b8e8) and issue #233 is CLOSED; per rule 4 the file-watcher lane is REMOVED — its durable facts are in docs/agent-handoff.md §1's arc bullet, its full review history in docs/lsp-file-watch-d3-framing.md and the two PRs. The one framed option deliberately left unbuilt (kernel notification) lives in the framing, triggered only if the 4 s idle-latency cap ever matters. The canonical-base line below and the handoff anchor moved to 122b8e8.

Updated 2026-08-11 — two merges and a discharge. The LSP file watcher D1+D2 landed as #234 (ae84d58) after one review round (P1 form-from-the-pattern, P2 cancelled-scan emission — both bite-verified), and git integration Stage 1 landed as #227 (b867f64) immediately after, refreshed onto the merged base and re-gated. The 2026-08-10 hold on #227 is discharged in order, not overridden. Both lanes below are rewritten to their remainders (D3; git Stage 2), their durable facts absorbed into docs/agent-handoff.md §1. Next, by user ruling: D3. The canonical-base line below and the handoff anchor both moved to b867f64. Several other lane headers still say OPEN for PRs that have since merged (#224–#232) — per this file's own rule, trust the canonical-base line over any lane header; those absorptions remain owed by their own lanes.

Updated later the same day, on a new machine. Development moved to the laptop; the recovery path in "Repository authority" below was exercised from this checkout and the githubsucks alias was absent and had to be added, exactly as that section anticipates. One lane opened: CI CRDT coverage, which had been sitting under "NEEDS A LANE" with no branch and no owner since #166. It is implemented on ci-crdt-coverage and its block replaces the old one below.

Updated 2026-08-05. One lane opened: macOS CI signal integrity (#215, in review), which this file required a lane for and did not have until review caught it — the #171 defect recurring. Its block is below.

Updated later the same day. #215 merged (main @ 12f2970) and that lane is rewritten, not removed — rule 4 removes a lane when its ARC is done, and Stage 2 is the arc. Stage 2 (hardening) ran on ci-signal-hardening, with its own lane block, its own checkpoint table, and a lane written before the PR was opened rather than after review asked for it. It merged as #216 on 2026-08-05, which completes the arc: R2 and R4 are retired with discriminating witnesses.

The lane is kept, not yet removed, and that is a deferral rather than a judgement. Rule 4 would remove it now — but its residue must be re-homed first, or removing it loses the state: R1 is referred to the async-runtime lane (Q#MCI3) and R3 is an unresolved possible product defect owned by the process-signal / PTY lane, neither of which has a block here yet. Retiring this arc and opening those two is an absorption pass, and doing it inside an unrelated feature PR is how a ledger acquires edits nobody reviewed.

Updated 2026-08-04. Four PRs landed since: the CI CRDT coverage lane #209, Distribution Stage 1 #211 (released as v1.1.0), the post-release accuracy pass #212, and bottom-panel Stage 3 #213 — which completes Arc 7. Its lane is removed per rule 4: the arc is done and its durable facts are in docs/agent-handoff.md §1. The distribution and CI-CRDT lanes are rewritten rather than removed, because each keeps named follow-ons.

This snapshot is an absorption pass, taken with ZERO open PRs — the one window in which a ledger refresh has nothing to re-conflict with, and taken deliberately before a machine move. Nine PRs landed since the previous anchor (#199–#207). Two arcs completed and their lanes are removed, their durable facts now in docs/agent-handoff.md §1: Journey Stage 1 (1a plus the whole 1b split) and test ambient-root isolation. Discovery and reap-ledger merged a stage each and keep lanes rewritten to what remains. docs/agent-handoff.md §1a now carries the whole board — every arc, open lane, deferred item and standing hazard in one view.

(Earlier note, retained because its reasoning still governs:) This snapshot is an absorption pass. Eight PRs merged on 2026-07-29 and 2026-07-30 (#188, #190, #191, #194, #195, #196, #197, #198) and the ledger had drifted to 1,854 lines carrying six lanes whose work was already on main. Those six are removed and their load-bearing decisions are in docs/agent-handoff.md §1 — rule 4's precondition, satisfied rather than deferred. The file is now 609 lines.

A lane is removed when its ARC is done, not when a PR merges. Two lanes survive their sub-stage merges and are rewritten to the remaining plan rather than deleted: generated-buffer immutability (Stage 1 merged, Stage 2 not started) and bottom-panel (Stage 2 complete, Stage 3 ahead). The bottom-panel block said so in its own text — "this lane is not removed at 2B-3's merge" — and a wholesale removal keyed on "the PR merged" would have discarded live planning. Read each block before cutting it.

#188's lane arrived with #188, which is the point: with several PRs open, a lane written on main for work that lands elsewhere re-conflicts on every merge. Written on its own branch it costs one conflict, at the merge that would have happened anyway.

The PTY terminate diagnostic (#176) was the last lane retained past its merge — retained because rule 4 removes a merged lane only after its durable facts reach docs/agent-handoff.md, and that absorption was unowned. The 2026-07-28 snapshot owned it: #176's facts are now in the handoff (§1's arc bullet and §5's two ops lessons about ticking observers and proving child exit), so its lane is gone. The Lean 4, GPU-terminal-input, inline-math (#172), dired (#169), and terminal config + copy mode lanes were removed the same way — the last of these was #180's work, folded into #182 so two open PRs would stop re-conflicting in this file.

Trust the canonical-base line below over any lane header: if a PR number appears in git log --first-parent githubsucks/main, it has landed regardless of what a lane says.

Two open PRs had no lane here at all before the 2026-07-28 snapshot — #174 and #171. An open PR is exactly the volatile work this file exists to record, so its absence is a ledger defect rather than a tidy omission: #171 drifted 153 commits while invisible here, and its still-green old CI run described a tree nobody had looked at since. When a PR is opened, give it a lane. All three have since merged — #174, #171 and #186 — so per rule 4 their lanes are gone again and their durable facts are in docs/agent-handoff.md (§5 for #174's lesson, §1 for the two framings).

Repository authority

• Canonical development URL: https://github.com/levineuwirth/pmacs.git. This ledger uses the normalized local alias githubsucks so its refs and recovery commands are identical on every machine. Remote names are otherwise machine-local: origin may name this canonical URL, a release mirror, or something else, and therefore has no authority by name alone.
• Canonical base at this snapshot: githubsucks/main @ d038f71 — GUI Stage 1-pre #237, the input seam (App::window_event from 655 lines to four; no behaviour change, no wire change), atop f8ad3e7 GUI arc Stage 0 #236, the arc framing and its documentation sweep. Beneath them e67ad07, the file-watcher arc absorption, atop 122b8e8 the file-watcher D3 #235 (closes issue #233), atop b867f64 git integration Stage 1 #227, atop ae84d58 the LSP file-watcher fix #234, atop 0e4c58d destination capture #231, 3cc1b85 worker identity Stage 1 #232, 0857bf4 discovery Stage 2 #228, 0190102 LSP LaTeX coverage #230, 7cf4653 the gate --protocol build step #229, 4bc55e8 per-worktree gate target dirs #225, dcb852e the R8 fixture fix #226 and b833b13 the QoL docs retirement #224. Beneath those, 9a26ac8: GPU horizontal scroll #223, which closes the QoL arc, atop 2b56d16 TUI horizontal scroll #222, 02f3ec3 ui.line-wrap #221 (protocol v22), 218d2e7 GUI zoom #220 and da56bec full_grid #219. Beneath those, db1bbe9: the tree primitive #217, atop 2657568 the macOS CI signal-integrity Stage 2 #216 (which retired R2 and R4), atop 12f2970 its Stage 1 registry #215, atop f186253: bottom-panel Stage 3 #213, which completes Arc 7, atop the post-release accuracy pass #212, Distribution Stage 1 #211 (released as v1.1.0, the first release with prebuilt binaries), and the CI CRDT coverage lane #209. Beneath those, cfc1710: discovery Stage 1 #207, the ambient-root isolation implementation #206, Journey Stage 1b-3 #205, 1b-2 #204 and 1b-1 #203, the reap-ledger diagnostic #202, the isolation framing #201, the process-signal diagnostic #200 and the ledger absorption #199. Protocol schema support is v6..=v23; the production server-first Hello still advertises v20 — two different facts, and #184 landed only the first. The upper bound moved to v23 at #228 (MinibufferPromptRows), after v22 at #221, which added InstanceMessage::LineWrapFacts; ADVERTISED_PROTOCOL_VERSION did not move and must not be edited to chase it. Verified against pmacs-protocol/src/message.rs, not carried forward: this line said v6..=v21 for two merges after that stopped being true. Historical v21 statements elsewhere in this file are correct where they describe a stage as it landed — only this current-state paragraph tracks the live range. The recovery floor advances with the base, so the check below now requires d038f71 or newer; a tree at db1bbe9 no longer passes — it would lack the entire QoL arc, which this file and the handoff both describe as complete. That is deliberate — a check accepting an older commit than the declared base passes on a tree the rest of this file does not describe. Lanes below that name an older base have not been re-based; derive their integration surface from git diff <their base>..main.
• On the transfer source, origin/main named a release mirror at d3fa632 and lagged badly. On the current destination, origin names the canonical URL. This difference is why all recovery begins by verifying URLs and normalizing githubsucks rather than trusting origin/main.
• The shared desktop checkout contained unrelated uncommitted work. The branches below were prepared in isolated worktrees; never clean or overwrite the shared checkout to recover them.

Start on another machine by inspecting its remotes:

git remote -v
git remote get-url githubsucks

If the second command says the alias is absent, add it; if it prints a different URL, stop and resolve that collision rather than overwriting an unknown remote:

git remote add githubsucks https://github.com/levineuwirth/pmacs.git

Then recover current refs:

git fetch githubsucks --prune
git log -1 --oneline githubsucks/main
git worktree list
git status --short --branch

The git log command must expose d038f71 — the base named above — or a newer intentional main. Keep this threshold and the canonical-base line in step: a recovery check that accepts an older commit than the base it declares canonical will pass on a tree the rest of this file does not describe. If it does not, stop and repair the remote/fetch configuration.

LAST EXERCISED AT d038f71, 2026-08-12, from an empty directory rather than by having its SHA swapped — which also discharges the outstanding obligation this paragraph carried at e67ad07, where the base advanced without the procedure being re-run. That debt is settled, not inherited: the advance recorded here was exercised as part of making it.

Every documented step ran, in order, on git 2.55.0:

1. git clone the canonical URL into an empty directory. The clone names it origin; git remote get-url githubsucks errors with No such remote, exactly as the section above anticipates.
2. Add the alias, confirm the URL, git fetch githubsucks --prune.
3. git log -1 --oneline githubsucks/main → d038f71.
4. The floor check, run against the OLD DECLARED FLOOR and the new one: e67ad07 and d038f71 are each an ancestor of the tip, so advancing the floor is valid rather than merely plausible. (9a26ac8 is the previous last-EXERCISED anchor, which is a different thing from the previous declared floor — the two had drifted apart, and checking the exercised anchor in the floor's place would have verified the wrong claim.)
5. The three-argument git worktree add <path> -b <local> githubsucks/<branch> form → a real branch with its upstream set (## recovered-local...githubsucks/gui-stage1-pre).
6. The documented trap, reproduced rather than assumed: the two-argument form on a remote-only branch succeeds and leaves ## HEAD (no branch). The correction below still holds on 2.55.0.

That distinction is the whole point of this paragraph: advancing the base is exactly when the recovery commands are most likely to have rotted, and a swapped SHA reads identically to a verified one.

Correction, found by re-running it. This file claimed the two-argument form fails for a remote-only branch with fatal: invalid reference. It does not fail. On git 2.55.0 it succeeds and leaves a detached HEAD — no branch, no upstream, git status reporting ## HEAD (no branch).

Still use -b, but for the opposite reason to the one recorded: the danger is not an error that stops you, it is that nothing stops you. Work committed in that worktree sits on no branch, is not pushed by a bare git push, and is exactly the "uncommitted work does not travel" hazard in a shape that looks committed. A documented error message that never appears is worse than no documentation, because the reader waits for a signal that is not coming.

GPU launcher / probe SIGINT teardown — PR #241 OPEN

Written with the branch's FIRST commit, per the standing correction from #171 and #215.

• Branch gpu-probe-sigint-teardown, base githubsucks/main @ 72da24a, worktree /home/jeans/Repos/personal/pmacs-probe-sigint. Recover with git fetch githubsucks && git checkout gpu-probe-sigint-teardown.
• REVISION 13 IMPLEMENTED (this commit). Helper emits the token on stdout; both consumers validate the (status, token) pair. The gate owns a guard-local capture dir, keeps || status=$? under set -eu, selects expected_token before any set -u-sensitive use, compares bytes with cmp against both permitted encodings, surfaces the helper's stderr only for validated verdicts, and prints status=/token= on every refusing branch. R-d validates the same pair from Command::output() bytes — no capture files, since only the shell needs them.
• Conformance: 45 shared cases, generated as a cross-product, run by BOTH validators (gate_validates_the_whole_shared_conformance_set, rd_precondition_validates_the_whole_conformance_set), plus Rust's X2 no-status spawn error = 46. 34 gate rows, 16 GPU rows, full gate green.
• A4 mutations, each biting: accepting any status 2 regardless of token → gate_refuses_on_helper_error_…; surfacing child stderr on a boundary failure → the conformance row and that row; token to stderr → sigint_helper_reports_safe_…. Noted for the record: the first mutation is caught by the dedicated row rather than by the conformance set, because the set's boundary cases mostly have empty stderr and so cannot see which branch produced the exit 2.
• CI ON 916007b: 12 GREEN, 2 RED — both macOS Test jobs, and it is the pre-declared A7 portability finding, not an environment excuse. Exactly one row: gate_maps_an_unexecutable_helper_to_error_not_ignored, left: Some(1) right: Some(2). The other five SIGINT rows pass on macOS, including both error cases, so helper and gate consumers are otherwise exercised there.
  • The gate returned 1 = ignored for a helper it could not execute — the exact conflation §7c forbids.
  • ESTABLISHED, not a hypothesis. The macOS log shows the shell's Permission denied followed by the gate's 1 | 2) message — so sigint_status was 1: macOS /bin/sh returns 1 for an exec failure where Linux returns 126. The status-only ABI cannot separate that from the helper's own ignored.
  • The raw status was NOT printed. An earlier entry here said the stderr carries it; the gate interpolates the number only in its catch-all branch, and this failure took the 1 | 2) branch. The path was identified by which message text appeared, not by a number.
  • A proposed repair was REJECTED in review and is recorded so it is not retried: moving ignored from 1 to 3 relocates the collision without closing it, because an exec failure can return any nonzero status. The generalisation: no exit status can prove the helper ran.
  • Framing revision 13 — APPROVED 2026-08-19 at 5dece3e — replaces the ABI with a validated (status, token) pair: 0/1/2 with pmacs-sigint-v1:safe|ignored|error, token alone on stdout, diagnostics on stderr, and any other pair — including macOS's status 1 with no token — a boundary error mapped to 2. Every refusing branch must print the observed status and token state as diagnostic context, never as the classifier. A shared conformance matrix replaces revision 12's withdrawn "both consumers use the same helper so they can never disagree", which stopped being true once each consumer validates the pair independently.
  • A6a is scoped to the GATE. R-d never sees a shell status: Rust's Command returns a spawn error with no exit status, and R-d's test is crdt-gated so macOS CI does not compile it. R-d on macOS is unexercised, recorded as a gap.
  • A7 is no longer "satisfied by disclosure" — macOS was reached and measured: five of six helper/gate rows pass, one defect (gate_maps_an_unexecutable_helper_to_error_not_ignored), R-d Linux-only.
• PR #241 (https://github.com/levineuwirth/pmacs/pull/241), opened 2026-08-19 from gpu-probe-sigint-teardown into main. Not merged; awaiting review rounds.
• CHECKPOINT — immutable event SHAs, because "this entry's own commit" goes stale exactly the way a tip SHA does: implementation landed at 3206433; the A6 both-consumer rows and the bounded negative path at 167d830; the two factual corrections at c9cc8dd; the gate-run record at 7cef9ca; the PR record at d64d300. Only the branch tip stays symbolic — a literal SHA naming a branch's own tip goes stale the moment the next commit lands, which this ledger has already recorded once. State at 3206433: pushed, signed G, worktree clean, git diff --check clean, full default gate green (8/8) in the foreground, 31 gate-acceptance rows passing. After this commit: 33 gate-acceptance rows and 16 gpu_invocation_acceptance rows.
• FULL GATE GREEN ON THE COMMITTED HEAD c9cc8dd — all 8 stages, log 20260819T160220Z-2339958, started at load 3.90. Recorded at 7cef9ca, which is docs-only on top of the gated tree; that exemption is what stops gate-result records recursing forever.
• The preceding attempt on the same head was RED, and is kept. Log 20260819T152209Z-2073040: 04-lib-crdt and 07-sweep failed on four wall-clock rows — composition_overhead_under_ten_percent, full_buffer_summary_flatten_scales_on_large_grammar_file, dired_renders_10k_entries_within_200ms, file_progress_notification_is_recorded_for_its_document — none touching this lane's change. Load average was 49.6, and ./verify_task_state.sh review/my-ruff-task golden was running under a separate toolchain at /usr/local/rustup with four rustc processes, having started about three minutes into the run and overlapping exactly the two stages that failed. That is evidence of WHEN, not proof of WHY, and it was recorded as "not valid evidence" rather than "environmental" — this lane has already retracted one confident environmental attribution. The green run on the same commit is what settles it; had any of the four failed again on a quiet machine, it would have been a real finding here. (An earlier draft said 35: that figure was the git_status_stage1_acceptance result line immediately below gate_script_acceptance's in the sweep log, misread as this suite's.)
• **Framing revision 12 at docs/gpu-probe-sigint-framing.md, approved 2026-08-19 at 1fc0df6 and IMPLEMENTED; superseded by revision 13, approved 2026-08-19 at 5dece3e — revision 10 was approved at 4fba9f6 and revision 9 at 15c25ec; neither approval covered the later mechanism finding and remedy selection. D1/D2 HAVE RUN and found the mechanism: SIGINT was ignored group-wide (SigIgn=0x1007) because the test runner was launched in the background — SIG_IGN is inherited across fork and survives exec, so it reached the launcher and probe, and kill(-pgid, SIGINT) was a no-op. Controlled arms re-run on committed head 77b623c with full SHA-256 captured per arm and byte-identical binaries: foreground both copies ok, setsid nohup … & both FAILED. I caused this by adopting background launches on 08-16 to evade the Bash tool's ten-minute cap — that is the "onset", and the subset-vs-full matrix was confounded with it throughout. A3's subset/full obligation is discharged by explanation, so D0b is not needed. Bet 1 withdrawn by scope and A5 retired by scope — D4 was never executed, so no claim is made that a real session behaves correctly, only that no evidence of a user-facing defect survives. A3/D0b are SATISFIED by that explanation — D0b is not owed and will not run. The approved revision 12 selects the remedy: R-b + R-d via one checked-in helper, scripts/check-sigint-deliverable. Its preserved-status inner probe maps to one complete ABI: helper exit 0 = safe, 1 = ignored, 2 = probe error; the helper owns the two failure diagnostics, and both consumers surface its stderr rather than interpreting raw probe statuses. Inability to execute the helper is error, never evidence of SIG_IGN. POSIX shell only: no /proc, so not Linux-only; no sigaction, so no unsafe. scripts/gate fails immediately with the explicit diagnosis; the target test reports the same precondition failure if run directly; no override, because a gate under ignored SIGINT cannot produce valid evidence. R-c rejected. The Linux-only D1/D2 instrumentation is removed once its evidence is portable. A1–A7 witness guard bite, direct-test diagnosis, unaffected foreground success, mutation, an otherwise unchanged gate, a distinct error outcome in both consumers, and qualified non-Linux-unix portability.
• IMPLEMENTED. scripts/check-sigint-deliverable is the shared helper (0 safe / 1 ignored / 2 error); scripts/gate refuses before any stage; the target test reports the precondition instead of the 5s deadline; the Linux-only /proc instrument is removed.
• Two bugs shipped in the first guard, both caught in review. A bare invocation under set -eu killed the shell at the helper's non-zero exit, so the refusal never printed. Replacing it with if ! helper; then status=$? captured the status of the negated condition — always 0 — so the gate printed the diagnosis and then ran the whole suite anyway. The working shape is helper || status=$?, the idiom the helper uses internally. The guard also moved to immediately after the worktree resolves, so a refused run leaves no log dir, ambient root or tmpdir behind.
• Four durable rows in gate_script_acceptance (31, was 27): helper safe / ignored / error, and gate refusal before stage 1. Verified to bite — mutating the gate back to either shipped bug fails gate_refuses_to_start_when_sigint_is_ignored and nothing else. Their absence is why 27 passing tests missed both.
• A7 — revision-12 HISTORY, superseded. It then read: satisfied by disclosure, Linux x86_64 only, no non-Linux unix reachable. That is no longer true — macOS CI reached it and measured it red. The live record is the CI entry above: five of six helper/gate rows pass on macOS, one defect, R-d Linux-only because its test is crdt-gated.
• D0a EXECUTED 2026-08-19 — verdict: difference NOT captured by the two commits. 10 runs, counterbalanced, N=5 per endpoint, clean detached worktrees with isolated target dirs, dirty=0 per run, zero voids, zero splits. A (7599661) uniform-red; B (724b785) uniform-red. So 7599661, which passed inside sweep-crdt on 08-15, fails 5/5 clean today: the two commits do not discriminate under current conditions, so no bisect will run. That is the whole claim — "source hypothesis eliminated" and "unreachable by source" are withdrawn, since a historical regression could be masked by a later environmental effect or a source/environment interaction. Failing to discriminate is not the same as not differing. The onset window is deprioritised, not excluded. No package activity in the window (pacman.log) — a cheap negative, not pursued further.
• The useful product is a RELIABLE REPRODUCTION — 10/10 across two commits at ~4 min/run — which is what let D1/D2 run at once. D1/D2 are DONE; the mechanism entry above supersedes this. Per-run provenance in docs/probe-sigint-evidence.md §D0a, transcribed in full into that committed document — after the first transcription corrupted every log digest by one hex character and dropped /tmp and MemAvailable. uptime was never captured and is UNKNOWN for all ten runs: §7 names it, the harness kept only the load averages, so that condition list was not fully satisfied. The classifications stand; D1/D2's harness must capture the whole list.
• Why it exists. ctrl_c_on_launcher_group_does_not_reach_spawned_daemon fails in gate stage sweep-crdt with "child did not exit within 5s". Pre-existing on main — 72da24a fails it in a clean worktree with its own target dir. The correct count is 119 green result summaries and TWO red binaries: gpu_initial_target_acceptance includes the suite as a module, so a reproducing sweep reds twice (log …-2144707/09-sweep-crdt.log:3097 and :3131). While it reds, no branch can present a green sixteen-stage gate, main included.
• panel-mapping-generation (§5b) is HELD BEHIND THIS LANE by explicit instruction. That lane is code-complete at 5174f73 with its own fifteen stages green; its sixteenth stage is this defect.
• Reproduction is 7/7 across full sweeps (F1–F7); every reduction R1–R10 is green. Each run is enumerated with exact command, worktree, HEAD, cleanliness and log digest in docs/probe-sigint-evidence.md — "0/N" is not a record.
• But R9 did NOT run the same compilations as the sweep. It executed …-91f51d0b… / …-6b4b8223…; the sweeps executed …-5d9105cb… / …-d4dae4f0…. Differing Cargo suffixes mean differing metadata hashes — different compilations. Historical byte identity is UNKNOWN and is never claimed: target dirs have been overwritten, so a hash computed today is the current occupant's. R9 establishes same target names and order, not same compilations. What the evidence is consistent with, not what it isolates: prior targets alone (R9) green, workspace selection alone (R10) green, both together (F1–F7) red. That is an observation, not a finding. --workspace selection is not sufficient by itself and not ruled out — later-selected packages can affect the build graph before their tests ever run, so "their targets execute after the failure" does not exonerate them.
• Ruled out by measurement — do not re-run: machine load; tmpfs starving RAM (settled by experiment, not argument — /tmp 21G→1.2G, available 27G→45G, still red); leaked daemons; inotify.
• NOT ruled out, contrary to earlier entries here: --workspace artifact selection, and the preceding tests. R9 appeared to clear them but ran different Cargo compilations, so the comparison was never made. Both are open.
• Ground truth, and what it does NOT establish. run_gpu's own path installs no handler: run_gpu (src/main.rs:324) blocks in command.status() with no handler, and grepping all of pmacs-gpu/src for signal machinery returns nothing. But the pmacs binary DOES contain signal machinery — install_signal_handlers (src/daemon.rs:628) registers SIGINT and SIGTERM; it is simply not on run_gpu's path. A source grep also cannot exclude a runtime or dependency installing a disposition. So the established fact is only: no explicit installation on run_gpu's path, and "whatever disposition they hold was inherited" stays a hypothesis until D2 measures it. The probe's event loop wakes at least every 50ms (pmacs-gpu/src/main.rs:1065) — but the process is not bounded: its stdin reader blocks in read_to_end (:1109) and, once ready, the loop leaves only when stdin closes (:1212). No claim is made that either process holds the DEFAULT disposition — absence of handler code cannot establish that, and inherited ignore is the leading hypothesis precisely because the source is silent.
• TWO retracted claims, both mine. (a) "Mechanism located" — launcher in do_wait, probe child in futex_do_wait. (b) The retraction of (a), which argued the failing launcher "must live ≥8s". (b)'s arithmetic is false: both reproducing binaries finish in ~5.19s including the 5s timeout, so the failing launcher lives about 5.1s — inside what the sampler saw, and a ">6s" selector would have captured nothing, repeating the error it was meant to correct. (a) is therefore not refuted by (b); it stays unproven for a different reason — under --features crdt the suite spawns root launchers from six call sites, so command line alone cannot attribute one to this test. The six (:509, :534, :544, :574, :725, :1097, all inside #[cfg(feature = "crdt")] mod crdt); the other two --gpu arguments sit under #[cfg(not(…))] and are compiled out. Do not key on process age. Key on the PID the test records.
• Diagnostics must DISCRIMINATE blocked delivery, inherited ignore, and an escaped process group: snapshots before and after the signal, for test parent / launcher / probe; per-thread SigBlk from /proc/<pid>/task/*/status; SigPnd/ShdPnd; and PID/PPID/PGID/SID. A post-failure snapshot cannot prove inheritance.
• Why that matters: SIG_IGN is inherited across fork and survives exec, while handlers do not. So a runtime disposition can arrive from the test harness, cargo, or the invoking shell without appearing anywhere in the source. Revision 1's "two processes with default disposition" contradicted its own hypothesis and is withdrawn; the assertion no longer appears above it either.
• Run provenance is a pushed document, docs/probe-sigint-evidence.md: exact command, worktree, HEAD, cleanliness, the Cargo suffixes executed, result and log digest per physical run. Three caveats stated there rather than smoothed over — R1 and R2 have no preserved log (revision 2 double-counted one log as both R2 and R6), cleanliness is UNKNOWN for every pre-manifest run, and R1–R10 ran in the panel-mapping-generation worktree, not at main. Log bodies are machine-local under /home/jeans/build/pmacs-gate-targets/probe-sigint-evidence/; /tmp is a tmpfs and they were nearly lost to a cleanup mid-lane.
• THE ONSET IS DATABLE, and it reframes the lane. sweep-crdt has 17 logs here. Counted per test copy: 13 with both copies ... ok, 1 where neither executed (stage died compiling pmacs, error[E0308], …-708693), 3 with both FAILED. Last observed green 20260815T185708Z, first observed red 20260816T063330Z; boot began 08-14 09:30, so no reboot between. "Pre-existing on main" holds (F1 at 72da24a) but "always broken" is contradicted.
• The onset is NOT a source boundary. Reflog/commit times put HEAD at 7599661 during the last green (3c06176 landed 40s after it finished) and 724b785 during the first red (5174f73 landed 08:45:41, after that run ended 08:42:01). Cleanliness captured for neither. 72da24a is an ancestor of 7599661 yet fails today while 7599661 passed on 08-15 — but those two observations differ in commit AND environment AND time, so they are non-comparable and support no causal conclusion of any kind. Earlier wordings here ("no source-monotonic cause does that", "outcome is not determined by commit alone") are both withdrawn: different commits can deterministically produce different outcomes, so the pair says nothing about determinism either.
• D0a is a decision procedure with no predicted outcome, and one run per endpoint decides nothing. That the failure has appeared only in the full sweep is what has been observed so far, not a property established of the defect. N = 5 full sweep-crdt runs per endpoint, counterbalanced AB BA AB BA AB — not strict A/B/A/B, which leaves B always following A and owning the final slot; counterbalancing removes systematic order confounding, and the residual last-slot asymmetry is accepted and stated. Same captured conditions as D0b plus uptime, free, /tmp usage and leaked-daemon count.
• The run classifier is TOTAL, and reads only the two copies of the target test: green (both ... ok), red (both FAILED), split (copies disagree → stop; that is its own defect), void (either copy never executed → discard and re-run, budget 3, then D0a stops). A sweep red only on unrelated rows is a green run; both outcomes occur in the historical logs — …-708693 is a void (compile failure), and …-2839374/…-830195 are unrelated-red with both copies passing. A bisect of 7599661..724b785 is permitted only on the expected-direction clean split — all N green at 7599661, all N red at 724b785. The inverted split is a real difference but contradicts the onset reading, so it is recorded and that reading is re-examined before any bisect. A mixed result means the failure is intermittent under fixed source and no bisect is justified.
• Red full-sweep count is SEVEN, not five (F1–F7 in the manifest), each with its own log digest; revision 3 said 5/5 while the framing separately cited a gate run the manifest never listed.
• D0 precedes every other diagnostic, in two parts: (a) reproduce the onset endpoints 7599661 and 724b785 clean, in isolated target dirs, under the N = 5 interleaved clean-split contract below — a bare difference decides nothing. (a) is DONE. (b) is RETIRED as a precondition (2026-08-19) because D0a yielded a reliable direct reproduction and D1/D2 measure the mechanism itself. Its obligation is now SATISFIED by §4c's controlled explanation of the subset/full difference, so D0b is not owed and will not run. As originally written it said: its obligation survives under A3 — if D1/D2 do not account for the subset-vs-full difference, D0b runs before the lane closes. It read: re-run the matrix at main under a harness capturing provenance and the artifact hashes executed at run time, since command shape silently changed the binary once already and a hash computed later reflects only what occupies that path now.
• Coherence: journey steps touched: NONE (framing §9). Earlier entries here assigned 12(a) "closing is clean" on the premise that the lane repairs Ctrl-C teardown; §4c withdraws that premise, because no product behaviour changes. What the lane affects is gate trustworthiness.
• Gates: ./scripts/gate --protocol --acceptance gpu_invocation_acceptance at minimum. The old three-consecutive- run A2 contract is SUPERSEDED — it was written for a teardown fix whose flakiness was unexplained. The mechanism is now known and deterministic, so the acceptance set is framing §8's A1–A7: guard bite, direct-test diagnosis, unaffected foreground success, mutation, an otherwise unchanged gate, a distinct error outcome, and a non-Linux-unix statement.

scripts/gate TMPDIR isolation — PR #240 OPEN

Written with the branch's first commit, per the standing correction from #171 and #215.

• PR #240 — https://github.com/levineuwirth/pmacs/pull/240.
• Branch gate-tmpdir-isolation, base githubsucks/main @ ca92796 exactly (the #239 merge). Recover with git fetch githubsucks && git checkout gate-tmpdir-isolation.
• Framing docs/gate-script-framing.md, revision 6 — AWAITING APPROVAL, and the PR must not merge before it has it. An earlier version of this bullet claimed "no framing" on the grounds that the fix was already recorded as standing. AGENTS.md grants no such exception: its workflow is framing → approval → branch → implement, unconditionally. Revision 6 widens §2's existing isolation responsibility to TMPDIR rather than adding a feature, which is why it amends this document instead of opening a new one.
• What it does: every gate invocation gets a fresh, disk-backed TMPDIR at <gate-root>/tmp/<mktemp>, exported once so every stage and every process they spawn inherits it, and reaped by the same exit trap as the ambient root. A gate run no longer needs a TMPDIR= override.
• A CHILD OF /tmp WOULD NOT HAVE WORKED. The hazard is an ANCESTOR marker — project detection walks upward — so a fresh subdirectory of /tmp inherits /tmp's ancestors and the same stray .git. The directory had to move somewhere the gate already owns.
• The socket-path limit shaped the layout, and the fix's own gate run found it. The budget is the supported-platform floor of 103 usable bytes — Darwin's 104-byte array minus its terminating NUL, not Linux's 108, because a Linux-derived limit passes where it is written and bind-fails on the macOS leg. A path cannot exceed that and the suites bind sockets inside TMPDIR. The first placement, $TARGET/gate-tmp/$STAMP-$$, produced a 114-byte socket path and failed six daemon and attach tests with "path must be shorter than SUN_LEN". It now hangs off the gate root (36 bytes) rather than the per-worktree target (60), with a short name: 47 bytes, leaving 61 for fixtures.
• A startup guard converts that failure class into a named one. Six socket failures deep in a suite name a limit, not a cause. The guard fails immediately with the path, its length and what to shorten. Its reserve is measured, not round: the longest suffix a fixture appends is 33 bytes (/.tmpXXXXXX/directory-target.sock), so 48 leaves ~45% headroom. Two earlier values were wrong in OPPOSITE directions — a "generous" 45 that fired on the gate's own behaviour tests, then a 30 that sat below the real maximum and would have passed 76–78-byte paths. The suite now roots its nested gates at a short base so it can SATISFY the unchanged production guard rather than be exempted from it.
• Witnesses, each mutation-checked. M-G-1b keeps the assignment and removes only export → the propagation row; its predecessor M-G-1 deleted both and so never proved inheritance. M-G-2 stops the reaping → the cleanup row. M-G-3 removes the ancestor check → the refusal row. M-G-4 reverts to existence-only, and M-G-5 reverts only the language-marker arm → the marker-type row, which is why that row covers a Cargo.toml directory as well as both .git shapes. M-G-6 counts characters → the multibyte row. M-G-7 moves the trap back after the guards → the rejection-cleanup row. M-G-8 restores the old for _anc in $(...) loop → the canonical-walk row, which is what proves the traversal neither word-splits a space-bearing root nor misses a marker visible only after pwd -P. Propagation is observed in a spawned child, because the gate exporting a variable would only prove the gate can export a variable.
• M-G-9 is the one that proves M-G-6 is not vacuous, and it needs three legs because the hazard is in the environment, not the code. Nine mutations in total.
  • 9a — mutant gate, probed pair → the row fails, and the exact-boundary row still passes. Re-run with /bin/sh excluded, so the CI fallback path is covered too: still fails.
  • 9b — same mutant gate, pair forced to byte-counting → the row passes. The defect itself, reproduced rather than argued.
  • 9c — no pair can qualify → the helper panics naming what it tried. A skip would be indistinguishable from a pass.
• The multibyte row's axis was wrong, and CI is what proved it. The row set LC_ALL=C.UTF-8 and assumed a character count followed. ${#x} counting characters is a property of the shell first: bash counts characters under a UTF-8 locale, dash counts bytes under every locale. /bin/sh is bash here and dash on the Ubuntu runners, so the row panicked on CI — the loud failure working as designed, but on a machine where the distinction is unobservable. The helper now probes (shell, locale) pairs and invokes the gate through the qualifying shell. That is not a contrivance: #!/bin/sh resolves to bash on Arch and on macOS, which is exactly where a ${#VAR} guard would miscount.
• Proved against the live hazard: /tmp/.git is still present on this machine, and the tests it reddened now pass with no override.
• Gates: ./scripts/gate --acceptance gate_script_acceptance, run with env -u TMPDIR — the point is that it needs no override. No --protocol: no wire change.
• Out of scope, deliberately: the overdue absorption of #239. This lane is the gate fix and nothing else.

GUI arc Stage 1a — TextInput at v24 — PR #239 OPEN

Written with the branch's first commit, per the standing correction from #171 and #215.

• PR #239 — https://github.com/levineuwirth/pmacs/pull/239.

• Branch gui-stage1a-textinput, base githubsucks/main @ 4f77491 exactly. githubsucks/gui-stage1a-textinput is the authoritative tip — the ref, not a SHA. Recover with git fetch githubsucks && git checkout gui-stage1a-textinput.

• No new framing. docs/gui-stage1-input-framing.md already governs every Stage 1 slice; A1–A9, the eight Q#S1-9 precedence rules, §8's wire contract and §11's gates are ruled there. Writing a 1a framing would duplicate an approved document.

• First commit is a GROUND-TRUTH RE-MEASUREMENT of §2 (revision 12), not code. §2 was taken at a994f37, before 1-pre moved almost every GPU-side coordinate in it. It is refreshed here rather than in its own PR so the contract and the code that depends on it are reviewed together. No ruling changes.

  • Moved: window_event :2734/655 lines → :4450/four lines; translate_key :10975 → :12053; the eight-arms description → three family decision functions over nine variants.
  • CORRECTION, wrong at BOTH anchors: "KeyEvent.text is never read" is false — the AltGr rule reads it (a994f37:2800, now main.rs:3251). The true claim is narrower: text is never read as the text a keypress inserts, only as a discriminator. This is load-bearing for A5, because §5's rule 2 already exempts "printable Ctrl+Alt recognized by the existing AltGr rule" — 1a widens text from discriminator to payload, and that is the change of kind the old wording hid.
  • CORRECTION: A4's exit site. 1-pre moved the mechanism without changing behaviour. A4 edits apply_keyboard's branch and return type, not window_event, and EventOutcome survives A4 — a native close still returns Exit.

• PROTOCOL-BEARING at v24 and therefore SERIALIZED. TextInput is an appended FrontendEvent variant; never widen a field in place, because postcard is positional. PROTOCOL_VERSION is 23 at this base and ADVERTISED_PROTOCOL_VERSION stays pinned at 20 and must not be edited to chase it. A frozen-byte pin goes on FrontendEvent's previous final variant, since an appended variant's own round-trip cannot detect a discriminant shift.

• A PROTOCOL_VERSION bump's blast radius is every version-sensitive test and NONE of them appear in the diff — handoff §1a records eight such failures across six suites on the last bump, of which CI showed one because cargo stops at the first failing target. Sort them: a tripwire assert_eq!(PROTOCOL_VERSION, N) is meant to fire; an absolute contract expressed as arithmetic on a moving constant is a defect. ADVERTISED_PROTOCOL_VERSION == 20 must NOT fire.

• IMPLEMENTED. All sixteen gates green under an isolated TMPDIR (log 20260812T204615Z-215223):

  ./scripts/gate --protocol \
    --acceptance gui_stage1a_acceptance \
    --acceptance gui_stage1a_wire_acceptance \
    --acceptance auto_pair_acceptance \
    --acceptance discovery_stage2_acceptance \
    --acceptance statusline_segments_acceptance \
    --acceptance vterm_stage3_acceptance
  

  --protocol is required — 1a changes the wire — and it is what adds the crdt build and the second sweep. gui_stage1a_wire_acceptance is #![cfg(feature = "crdt")], so it runs 2 tests in the crdt sweep and 0 in the default one; checked in the logs rather than assumed, because a suite that compiles to nothing reports ok.

• Evidence: 8 + 2 acceptance rows, 6 producer/router rows, and the A1–A4 unit witnesses; mutations M-1a-1 … M-1a-6b, each failing the row it targets.

  • M-1a-1 single-scalar back through the generic insert → the record row and the auto-pair row.
  • M-1a-2 break_command_chain deleted → the primed-chain row alone.
  • M-1a-3 TextInput selection back below the intercept return → the intercepting-producer row alone.
  • M-1a-4 typed text through encode_paste → A8, with the forbidden bytes at the PTY.
  • M-1a-5 inbound gate disabled → the v23 row, with REFUSED inside the CRDT op.
  • M-1a-6b a variant inserted before PanelPointer → the frozen-byte pin, discriminant 15 → 16.

• M-1a-6 (the first attempt) was a WRONG MUTATION, not a vacuous pin, and is recorded because the failure mode is instructive: the wedge went in after PanelPointer — where an append belongs — so nothing shifted and the pin passed, correctly. A mutation aimed at the wrong side of a boundary reports a sound pin as worthless.

GUI arc Stage 1 — 1-pre MERGED as #237 (d038f71); 1a is next, NOT STARTED

The lane is rewritten, not removed. Rule 4 removes a lane when its ARC is done, and the arc is Stage 1 as a whole: five slices remain.

• Framing docs/gui-stage1-input-framing.md, revision 11, APPROVED after eight rejected revisions. It is Stage 1's framing for all slices and governs every later branch; only Stage 0 was framed by the arc document itself. Revision 9 is the approved design; 10 recorded a scope correction found against the 1-pre implementation; 11 retracts 10's claim that P2 was satisfied by route classification alone, and corrects the Stage 1a consequence 10 got wrong.
• Slice order, each its own branch and PR: 1-pre → 1a* → 1b → 1c → 1d → 1e*. 1a and 1e are the two protocol-bearing slices — v24 TextInput and v25 OpenTarget/OpenTargetResult — and they are SERIALIZED against each other and against every other wire change in the project. 1c is not protocol-bearing, under Q#S1-8.
• NEXT: 1a, and nothing of it exists yet — no branch, no code. It carries the v24 TextInput variant, so it must run alone. PROTOCOL_VERSION is 23 at this base, and ADVERTISED_PROTOCOL_VERSION stays pinned at 20 and must not be edited to chase it. Its nine contracts (A1–A9) and the Q#S1-9 precedence rules are in the framing; A4 deletes the idle-Escape local quit, which is pre-existing behaviour, not something 1-pre introduced — 1-pre preserved it and moved it behind an EventOutcome return, and 1a removes it. EventOutcome survives that removal: the native close still returns Exit.

What 1-pre landed, and the facts worth not re-deriving

• App::window_event went from 655 lines to four: call dispatch_window_event, exit if it asks. Deciding is route_event(&WindowEvent) -> Route, composing one decision function per family; performing is seven apply_* methods. No behaviour change, no wire change.
• A route carries the DECISION, not the effect. A wheel route holds a delta; whether that becomes a viewport update, a panel event, a terminal event or nothing depends on State. This is why P2 needs a second harness, and why revision 10's contrary argument was retracted.
• Two harnesses. RoutingHarness answers where did this event go (13 rows, no GPU). EffectHarness answers what did it do (9 rows) — a real AttachClient over a socketpair through the real handshake, outbox, writer thread and encoder, a real windowless State, and the production dispatch. 22 witnesses, 24 mutations M1–M24; twenty-three fail their own rows and M6 is the P3 exception check, which must stay green.
• dispatch_window_event is why P2 was reachable at all. Left inside window_event, the dispatch would force a harness to re-implement it, and a harness that re-implements what it tests witnesses its own copy.
• The sentinel is the success condition; the 30 s read ceiling is only an error ceiling. Steps are delimited by a non-coalesceable sentinel key rather than a sleep, so absence is never inferred from duration — but an unbounded blocking read would wedge the gate instead of reddening it, and a hang looks like slowness until the job is killed.
• TWO ACCEPTED STRUCTURAL EXCEPTIONS, both measured rather than asserted. P3: deleting window_event's whole body leaves all 265 pmacs-gpu tests green, so no headless test in the crate observes the delegation — what it covers is now one if. P1, keyboard only, and winit's rather than ours: KeyEvent carries a pub(crate) platform_specific field, so no WindowEvent::KeyboardInput can be constructed outside winit. It does not reach the pointer families — DeviceId::dummy() exists for exactly this and all three pointer events are constructible, checked before the exception was written down.
• EventOutcome survives A4, and one producer is not one variant. The crate has exactly one executable event_loop.exit(), in window_event. A4 removes the keyboard Exit producer, leaving the native close; the type stays because dispatch_window_event must still distinguish Continue from Exit on every event. What A4 changes is apply_keyboard's signature.
• The effect rows execute in exactly ONE CI job, checked with cargo metadata: workspace_default_members is the root pmacs package alone, so the test matrix and crdt-test — both bare cargo test --all-targets — never compile pmacs-gpu's unit tests. Only gpu-render runs them, with lavapipe, vulkaninfo and PMACS_REQUIRE_GPU=1. The harness's adapter assert is unconditional, so a missing adapter can never become a quiet ok.
• A stray /tmp/.git reddened the first gate run and had nothing to do with this branch. Established on signature, not test name, by four literal --exact invocations; the marker was left in place and an isolated TMPDIR used instead. scripts/gate does not isolate TMPDIR — recorded in docs/agent-handoff.md §1, where the standing fix is assigned to the gate lane.

The GUI arc — Stage 0 MERGED as #236 (f8ad3e7)

Written at the branch's first commit, with the framing, which is what this arc's own §5 requires of every PR in it. The standing correction from #171 and #215 was missed at #224 and #225; this lane exists to stop the streak rather than to note it again.

The park is discharged: #227 merged as b867f64, and the file-watcher arc (#233) closed via #234 and #235. Rebased onto e67ad07; the single framing commit replayed with no conflict.

Stage 0's absorption scope was RE-DERIVED from the tree rather than taken from this lane's own earlier text, and the earlier text was wrong in the optimistic direction. add0ba1 absorbed #227 and #234 only; a reading of its −532-line diff as "half of Stage 0's absorption" was too generous. Five stale lanes remain below, and two COHERENCE.md corrections had not been made at all. What is done here is listed at the commit that does it, not promised here.

• MERGED as #236 (f8ad3e7). The branch was gui-arc-stage0, based on e67ad07 after the 2026-08-11 rebase and branched at 0e4c58d. Recovery instructions are removed deliberately: a merged lane that still says "checkout the branch" sends a reader to a tip that no longer moves. Its content is on main.
• Framing docs/gui-arc-framing.md, revision 3, APPROVED 2026-08-10 after two review rounds (two blocking findings each round, closed). It is also the framing for Stage 0 itself, which is docs-only; Stages 1–10 each require their own framing before their branch.
• The park is over and the work is MERGED. The branch was parked at its first commit until #227 merged, because #227 was 72 main commits behind and touched the three files Stage 0's absorption rewrites. #227 merged (b867f64), #233's arc closed (#234, #235), this branch rebased onto e67ad07, the absorption ran, and it landed as #236.
• What landed (docs only, no src/): the absorption pass enumerated in the framing's §5 — five stale lanes, the authority/recovery anchor, COHERENCE.md's v6..=v21 → v6..=v23, the U4 correction and the U9 rewrite in docs/ci-red-signatures.md, the stale right-click backlog line, and journey step 11's verdict (falsified by #232) — then the per-frontend journey table, the §16 product subgrade the scorecard will point at, §20 placement, the handoff cross-reference, and the "Arc 8" retirement.
• Two absorption items that are NOT simple deletions, recorded here because getting them wrong is silent: #228's lane must lose only its PR-specific block, while the standing Discovery lane (P4) is rewritten to "Stage 2 merged; later discovery work remains" — predicate evaluation, command metadata, help unification and the prefix decision are all still open. And v6..=v23 must not sweep away the same row's "production attach remains v20", which is correct (ADVERTISED_PROTOCOL_VERSION is 20).
• Verification (2026-08-11, committed branch tip): FULL PRE-PR SUITE PASS. Stage 0 changes no code, so there is no touched acceptance suite; that does not exempt a docs-only PR from the standing gates in AGENTS.md. Ran cargo fmt --check; cargo clippy --workspace --all-targets -- -D warnings as its own step; cargo test --lib; cargo test --lib --features crdt; cargo test --test m4_acceptance -- --skip basedpyright; PMACS_REQUIRE_GPU=1 cargo test -p pmacs-gpu; and git diff --check.

Git integration — STAGE 1 MERGED as #227; Stage 2 must be scheduled alone

PR #227 MERGED 2026-08-11 (main @ b867f64), after five review rounds, a macOS CI round, and a base refresh: it was held unmerged behind issue #233 by the 2026-08-10 ruling, refreshed onto the merged base (e2394c7, a clean merge whose only file shared with #234 was this ledger), re-gated 11/11 locally and 14/14 on CI. Durable facts are absorbed in docs/agent-handoff.md §1; the framing (docs/git-integration-framing.md, revision 5) and the PR carry the full five-round review history.

What shipped: *git-status* — a listview panel over git --no-optional-locks -C <dir> status --porcelain=v2 --branch -z — and *git-diff* (file-level, plain generated text), with the install-once keys extension on listview. builtin/runtime/git.lua, 34 acceptance tests, no wire change.

Stage 2 (gutter markers) is the remainder, and it is NOT freely schedulable: it needs new DecorationKind variants — a PROTOCOL_VERSION bump — so it must run alone, per the strict serialization rule on wire changes. No branch, no framing yet.

Residue that stays live here:

• §9 negative impact stands: git runs as a spawned process, and spawned processes do not appear in *workers*. A fifth unattributable background thing, labelled honestly; a label is not attribution. The D3 lane (above) and §9 Stage 2 own the model.
• The latent macOS sibling: tests/gpu_invocation_acceptance.rs writes a non-UTF-8 filename to disk inside #[cfg(feature = "crdt")], and the crdt job is ubuntu-only — it fails the day that job gains a macOS leg, the same way g6_2 did (handoff §1: macOS cannot hold a non-UTF-8 filename).

Worker identity Stage 1 (§9) — MERGED as #232 (3cc1b85)

Written with the lane's first commit, per the standing correction from #171 and #215.

Branch worker-identity-stage1, base githubsucks/main @ 4bc55e8 (the #225 merge). githubsucks/worker-identity-stage1 is the authoritative tip — the ref, not a SHA. Recover with git fetch githubsucks && git checkout worker-identity-stage1.

• Framing docs/worker-identity-framing.md, revision 4, APPROVED 2026-08-09 after four review rounds. Scope: COHERENCE.md §9's "mechanism without identity", and journey step 11 — the last of Priority 1's own work, sitting in another section's arc.
• Revision 2 took two blockers. owner is removed entirely: populated from static per-subsystem constants it is an origin, not an owner, and would misattribute third-party work at the exact point §9 wants attribution. It is not retained under a safer name either — origin/subsystem would be adopted as ownership by use and would squat on the slot P3 must fill. And the handler-name recovery was respecified as a mechanism: revision 1 claimed the name was "in hand at the one place that throws it away", which was wrong about the call chain (dispatch → arbitrary handler → Lua wrapper → Rust binding, with the wrapper layer documented as bypassable).
• Revision 3 took a third blocker: the ambient's extent is not synchronous. A handler may Handle:await() and park with the name still pushed, leaking attribution to unrelated later work. Rule 1 now enforces non-yieldability, modelled on the existing _in_commit_scope() refusal in Handle:await (builtin/runtime/async.lua:87-90) — rejecting before the park, unconditionally rather than only when a yield would occur, and covering both yield points.
• Q#W-7 — a pre-existing defect found while scouting that guard, and APPROVED for repair in this lane. pmacs.async.yield_to_next_tick() (async.lua:243-245) is public, yields, and carries no _in_commit_scope refusal — so Journey Stage 1a's Q#JR14b invariant has a second entrance. Same helper, same invariant, same edit family, so splitting it would have preserved a known hole without reducing integration risk. Reachability by a real caller is UNPROVEN — the defect was found by reading, and the tests pin the guard rather than reproducing a user-visible bug. That belongs in the commit message so nobody later cites this as an observed failure.
• Revision 4 also scoped rule 1's claim to what it enforces. Revision 3 said "all yield points"; it covers the two supported pmacs yield APIs. Raw coroutine.yield stays reachable — R46 is a convention, and the scheduler diagnoses a non-Handle yield only after the coroutine has suspended (async.lua:197 resumes, :212 inspects), so no refusal in a yield helper can intercept it. Recorded as a residual, and explicitly not covered by a test that would imply otherwise.
• NO WIRE CHANGE, which is what lets this run beside the two lanes already in flight. The statusline activity indicator is a fourth pmacs.statusline.register provider (terminal/syntax/lsp are the three existing adopters), evaluated per frame inside paint_frame (src/editor.rs:4560) and riding the existing StatuslineSegments vector. No variant, no bump.
• Scope: a required purpose on PendingJob and ProcessSpec through the single allocation funnel (src/async_runtime.rs:746, which every dispatcher and register_external passes through), a runtime-owned dispatch-name ambient recovering the handler name that pmacs.workers.dispatch currently discards, the *workers* rendering, and the indicator. Non-optional so the compiler, not a test, proves every caller supplied one.
• Two scouting findings that shaped the design, both verified: PendingJob carries eight fields, not the audit's seven, and the eighth's doc comment cites §9 by name as the reason identity belongs on the job rather than in a side map — so this extends a merged decision. And pmacs.process.list filters to LineOriented (src/lua_bindings/mod.rs:8980), with three acceptance suites using #pmacs.process.list() as a leak detector, so making terminal PTYs visible is deferred to Stage 2 with a separate accessor rather than by widening this one.
• Deliberate deviation from the audit, flagged for review: §9 names owner/purpose/parent together as the prerequisite; Stage 1 takes only purpose — one of the three, not two. owner was removed in revision 2: nothing in the runtime knows which package asked for a job, so an owner field could only have been filled with the same handler name purpose already carries, and an empty one reads as "unowned" rather than "not tracked". parent is out for the matching reason — it needs an ambient "currently-running job" context, and an unpopulated parent reads as "no parent" rather than "not tracked" (Q#W-5). The package-ownership slot stays deliberately empty until P3 can fill it with a real signal (framing §3, §7).
• Gates: scripts/gate --acceptance worker_identity_acceptance --acceptance journey_acceptance --acceptance statusline_segments_acceptance --acceptance compile_mode_acceptance --acceptance m8_6_acceptance. No --protocol — no wire change. compile_mode and m8_6 joined at review round 1, which moved their spawn call sites; m8_6 covers the pmacs-magit fixture, and a newly required field is exactly the kind of change that breaks a package fixture quietly.
• IMPLEMENTED at 1aca0ee, with review round 1's blocker fixed at 2162737 and review round 2's three findings at 6661125. tests/worker_identity_acceptance.rs is the new suite: 24 tests, plus one consumer-side witness beside the private renderer in pmacs-gpu.
• journey_acceptance passed UNTOUCHED (47/47) — the stop signal did not fire. Q#W-7 edits the commit_to guard family, so any of its established pins needing an edit would have meant this altered Journey Stage 1a's semantics rather than closing a gap in them. Its diff versus main is empty, and so is the diff for all three #pmacs.process.list() leak-detector suites (m6_8_multi_repl_acceptance, compile_mode_acceptance, lean4_stage1_acceptance) — Q#W-4's preservation claim, checked the way the framing asked.
• One pre-existing assertion did change, and it is an inventory rather than a contract: statusline_segments_acceptance's builtin provider list becomes ["activity", "mode", "terminal", "lsp"]. activity sorts first because async.lua is loaded before syntax.lua, terminal.lua and lsp.lua. That assertion exists to grow when a builtin provider is added; it is listed here so the change is not mistaken for an accommodation.
• 23 mutation checks, each test falsified by removing its own fix. The ones worth naming: siting the await guard inside the _is_complete branch (the already-complete case then slips through — which is the whole reason the guard is unconditional); replacing pcall/pop/rethrow with a bare handler call (a raising handler leaves the name pushed and the next dispatch inherits it); composing "<name>" instead of "<name>: <purpose>" and vice versa (each half passes the other's test); first() instead of last() on the name stack; oldest→newest in activity_summary; and, on the GPU side, painting an unthemed modeline face as the band colour, which would have made the indicator invisible without failing anything else. One of the twenty is a preservation check rather than a new claim: bracketing pmacs.workers.dispatch with local ok, result = pcall(...) truncates a handler that returns more than one value, which every other test in the suite tolerates. Round 1 added three more against the spawn refusal: restoring the label fallback, accepting an empty/whitespace-only purpose, and reading the field non-raw so a metatable can smuggle one in.
• Two residuals, stated rather than tested around. Raw coroutine.yield inside either dynamic scope still leaks the scope — loudly, through pmacs.error, but it leaks; no refusal sited in a yield helper can intercept it (framing §2). And Q#W-7's reachability by a real caller stays unproven: the commit message says so, and the test pins the guard rather than reproducing a fault.
• Review round 1 blocker — pmacs.process.spawn now REQUIRES purpose. The first implementation made it optional at the Lua surface, falling back to label. That preserved compatibility and delivered nothing: §9's complaint about ProcessSpec is exactly that label is "caller-supplied, unvalidated convention", so a purpose defaulting to it hands every caller back the convention the lane exists to replace. Refused on five shapes — absent, empty, whitespace-only, wrong type, metatable-provided — each asserting the process list is unchanged, since a validation that rejects after spawning has already done the thing it rejected.
• That is a BREAKING CHANGE to a public Lua API, taken now on purpose. §10 grades extension trust "missing (one class)" and P7 package lifecycle has not started, so the third-party population is ~zero and the cost only rises later. Checked for a reason that would be wrong and found none: pmacs.process.spawn has no API-reference documentation and no stability promise in docs/ (the package-author guide's only mentions are an audit-rule classification and a pointer to the bundled REPL; its semver language governs packages' own versioning, not pmacs's Lua surface), and lua_to_spec has exactly one caller. Eleven executable call sites updated, each with a real description rather than the label copied across: repl/init.lua, compile.lua, lean.lua, the pmacs-magit fixture, and seven in tests. The two pmacs.process.spawn("ls") occurrences in src/audit/mod.rs and tests/m7_9_acceptance.rs are audit fixture source text — lexed, never executed — and are deliberately untouched.
• Review round 2 — the display-text boundary, fixed at 6661125. Three findings, and the fix is deliberately different in each place because the constraint is.
  • P2a: invalid UTF-8 bypassed the purpose diagnostic. required_purpose read the field with value.to_str()?; Lua strings are BYTE strings, so purpose = string.char(255) surfaced mlua's generic conversion error before this lane's own message existed. It refused before spawning, so nothing leaked — the defect was the message. Third occurrence of this class in the project (the destination-capture lane corrected the same shape two rounds ago), so the whole diff was audited for it: exactly one more, _push_dispatch_name taking name: String, now mlua::String with an owned diagnostic. Those two are the only Lua-string reads this lane added; every other binding it adds takes (). The remaining pmacs.process.spawn fields (label, command, args, env, cwd) still convert generically — pre-existing, untouched, and named here rather than silently inherited.
  • P2b, half one: handler names are refused at the source. pmacs.workers.register type-checked and nothing more, which was fine while the name died inside dispatch. It no longer dies there, so the name now gets purpose's meaningful-value standard plus control characters.
  • P2b, half two: purposes are ESCAPED at presentation, not rejected at the registry — consistent with the #228 decision. A purpose may legitimately contain a newline (a path can; pmacs-magit's spawn purpose is an argv), so the one-line constraint belongs to the surface that has one row. purpose_for_one_row states the property it exists for — a row must not be able to forge another row — escapes the Unicode Cc class (so ESC cannot open a terminal sequence either), borrows unchanged when there is nothing to escape (byte-identity is structural, not asserted), and does not escape backslashes: no number of them makes a second row, and doubling them would cost byte-identity for ordinary text. Two callers: the *workers* rows and ActivitySummary, which exists for one consumer with exactly one row. pmacs.workers.snapshot() is the describe-command of this lane and stays raw — asserted, so a clip that deleted the text everywhere would fail rather than pass.
  • P3: two stale recovery summaries, both fixed section-locally — the framing doc's "Implementation may proceed", and this file's claim that Stage 1 took the "first two" of owner/purpose/parent. It takes one: owner was removed in revision 2, and the claim that argument overturned was still standing here.
  • Seven more mutation checks, each failing its own test and no other (30 for the lane): the two UTF-8 diagnostics, the two register guards, the two escaping call sites, and purpose_for_one_row neutered to the identity — which fails both surfaces' tests and nothing else, since it is the shared helper.
  • All 13 gate steps green at 6661125 (log 20260809T173314Z-1552101): lib 1920, lib-crdt 2105, worker_identity 24, journey 47/47 UNTOUCHED, statusline 7, compile_mode 73, m8_6 12, m4 151, gpu 242. The three #pmacs.process.list() leak detectors and journey_acceptance are byte-identical to main in round 2 — the stop signals did not fire, and round 2 edited no test outside its own suite. The preceding run of the same command was red on three tests and none of them was this diff's — R7 for the third time plus two wall-clock budget tests; recorded in docs/ci-red-signatures.md rather than re-run away silently.
• Review round 3 — a diagnostic that named the wrong surface, fixed at b2e8efd. required_purpose's invalid-UTF-8 refusal told the caller their process purpose "is displayed to the user in *workers* and in the modeline". Neither is a process surface. Stage 1 deliberately keeps processes out of both (Q#W-4, framing §3) — a process's purpose is exposed through pmacs.process.list and nothing else — so the message sent the reader looking for their process in two places it will never appear. The refusal itself is correct and stays: a purpose with no display form anywhere is still refused.
  • The two UTF-8 refusals now name different surfaces, because they reach different ones. The job-side twin (_push_dispatch_name) legitimately names *workers* and the modeline — a handler name is composed into a job's purpose, and a job does render in both — so it was made to say so explicitly rather than left at the vaguer "as part of every job's purpose", which named no surface at all and would have made the divergence unassertable.
  • A new test asserts both directions, positive and negative (the_two_utf8_refusals_each_name_the_surface_their_own_text_reaches, 25 in the suite — 24 before this round, plus this one; an earlier revision of this bullet said 26): the process message contains pmacs.process.list and not *workers*/modeline; the job message contains both of those and not pmacs.process.list. The existing row-table assertion in spawning_without_a_real_purpose_is_refused_and_starts_nothing now runs as far as the surface name too. Without the negative half a later "unify the wording" edit reintroduces exactly one wrong sentence and passes everything else.
  • Three mutation checks, each red on its own claim: restoring the old process wording fails both content assertions; collapsing the job message onto the process wording fails only the new test (which is the point — the old job test asserted the prefix alone); and restoring the job message's original vague wording fails it too.
  • The rustdoc carried the same defect risk and was fixed with it — required_purpose now states which surface it names and why not the other two, and the _push_dispatch_name comment states the converse. A string literal corrected while its doc comment still argues the other way is one refactor from reverting itself.
  • Gate: all 13 steps green at cb7730d (log 20260809T200907Z-2672209). The two preceding runs of the same command were red on step 12-sweep, on a DIFFERENT wall-clock render-budget test each time (20260809T195332Z-2113672, 20260809T200120Z-2427128; load average 12.9/23.9 with sibling lanes building). All three pass in isolated reruns, none reds twice, and the diff is two string literals, their doc comments and one test — no render path is touched. Recorded as U7 in docs/ci-red-signatures.md rather than re-run away silently. journey_acceptance 47/47 UNTOUCHED and the three #pmacs.process.list() leak detectors unedited — the stop signals did not fire.
• Surfaces that changed shape, for anyone rebasing onto this: AsyncRuntime::allocate/allocate_with_resource collapsed into one private JobSpec-taking funnel; register_external grew a third parameter; ProcessSpec::new grew a third parameter (~40 call sites, nearly all tests); ActiveJobInfo/CompletedJobInfo/ProcessSpec each grew a required purpose field, and pmacs.process.spawn requires purpose in its spec table.

scripts/gate --protocol build step — MERGED as #229 (7cf4653)

MERGED as PR #229 — https://github.com/levineuwirth/pmacs/pull/229, at 3b10f9d, 14/14 CI green including both macOS legs. main is now 7cf4653. (This lane still awaits Rule 4 retirement — its durable facts belong in the handoff before the entry is removed. Corrected here only because the previous text said "Held, not merged", which the merge falsified; the retirement itself is not this lane's work.)

History, retained: opened at 93d557a. Its first CI run went red on Test (macos-latest / lua54); the rerun turned that selector green and went red on a different one. Both are recorded as U4 and U5 in docs/ci-red-signatures.md, as separate incidents per the matching rule rather than one signature twice.

Registry numbering conflict, expected at merge. worker-identity-stage1 independently defines its own U4 and U5 on its branch. This lane merges first, so on main the rows above are U4/U5 and worker identity must renumber its pair on rebase. Flagged here because a rebase that resolves the textual conflict without renumbering produces two different incidents sharing an id, which is exactly the failure the registry's matching rule exists to prevent.

Written with the lane's first commit, per the standing correction from #171 and #215.

Branch gate-protocol-build, base githubsucks/main @ 4bc55e8 (the #225 merge). githubsucks/gate-protocol-build is the authoritative tip — the ref, not a SHA. Recover with git fetch githubsucks && git checkout gate-protocol-build.

• Framing docs/gate-protocol-build-framing.md, revision 5. The fix itself is implemented and green at 49bc141; its regression witness landed separately at 677fd25, after review found the original witness did not reach the step it named. Narrow by design: one missing step in one script, plus the boundary question that let it go missing. No src/, no protocol, no feature work.

• WAS THE OPEN BLOCKER — the witnesses did not reach the step they name. CLOSED at 677fd25. --print-plan strips names before printing, so the ordering assertion saw only commands; --self-test hardcodes build-crdt inside its own synthetic plan. Review demonstrated the consequence: renaming the real build step to sweep-crdt left both tests passing. So the lane had shipped without the regression guard it was created to provide. §7 requires both real emitter pairs — build-crdt and sweep-crdt, name and exact command — because the hole is symmetric and revision 4 closed only half of it. The synthetic --self-test stays: it witnesses the runner (failure naming, FAILED: list, log paths, non-zero exit, and continuation via the sentinel), which is a different thing from attributing the real step, and it may no longer stand in for it. What closed it is the "THE WITNESS DID NOT REACH THE STEP" bullet further down — --print-plan-named, with all four renames and drifts mutated red.

• The defect, as found. --protocol adds the CRDT workspace sweep, whose documented precondition is cargo build --workspace --no-default-features --features luajit,crdt — documented in handoff §5 at the time, §3 now. The plan emitter had no build step at all — read from the source, not inferred from the failure.

• Why it was latent, and why that makes it urgent rather than tidy. Before #225 every worktree shared one CARGO_TARGET_DIR, which almost always already held a pmacs-gpu binary, so the precondition was satisfied by accident. Per-worktree target dirs start empty. The hazard is not the red gate that stops you — it is a green --protocol run whose crdt sweep was decided by the state of the build directory rather than by the diff. That is a gate reporting coverage it does not have, which is what #225 exists to prevent.

• Observed on PR #228's first gate run: twelve gpu_invocation_acceptance::crdt::* failures, all "build pmacs-gpu before this acceptance suite", with debug/pmacs-gpu absent.

• The durable half is a boundary question. scripts/gate's header names handoff §3 as the owner of its reasoning, and this precondition lives in §5 — a coherent cause for the omission, not mere oversight.

  Resolved in framing revision 2: §3 becomes the SOLE normative home, §5 keeps the incident and its signature as history, and the script's header keeps citing §3 ALONE. Revision 1 proposed citing both, which splits one executable contract across two homes and weakens the script's only clean boundary at the same time as Q#GR-4 declines to build any automated check for prose drift. This entry recorded that superseded decision until now; a recovering machine reading the stale version would have rebuilt revision 1's wrong boundary.

• Q#GR-1 — SETTLED BY OBSERVATION, 2026-08-09, before any fix was written. On a disposable target directory (never a live lane's), with debug/pmacs-gpu asserted absent before each run as a recorded precondition, each sweep run alone from that same cold state so neither could have built the binary for the other:

  sweep	exit	result	pmacs-gpu after
  default	0	green, 114 test targets	still absent
  crdt	101	exactly 12 failures, all gpu_invocation_acceptance::crdt::*, all "build pmacs-gpu before this acceptance suite"	still absent

  So framing §3's inference holds and §4's "only under --protocol" is correct — the default sweep never builds the binary and never needs it. Mechanism, now established rather than guessed: pmacs-gpu has no tests/ directory, so cargo never uplifts its bin to debug/pmacs-gpu; only an explicit cargo build produces it.

  Found while doing it, and worse than the twelve: bottom_panel_stage2b_gpu a54 reported ok in that cold crdt sweep. Its only path that does not spawn pmacs-gpu is its skip branch, so a test whose whole purpose is real wgpu rendering passed having rendered nothing. The missing build does not merely fail twelve tests — it voids coverage in tests that report green. (vterm_stage3 a37 has the same shape by source read; cargo captures passing tests' output, so the skip is invisible in the log.)

• What landed. A named build-crdt step emitted immediately before sweep-crdt under --protocol, carrying the exact §5 invocation — not folded into the sweep command, because cargo build … && cargo test … reports a build failure under the name sweep-crdt. Plus --self-test (Q#GR-5): a hardcoded three-line synthetic plan — pass, fail-named-build-crdt, pass sentinel — driven through the real runner loop, which is what makes the runner's failure naming and continuation observable at all. (It does not witness the real step's name — see the round-two entry below, which is where that gap was found and closed.) PLAN_FILE is deliberately not injectable: that would turn the runner's eval into a general command executor, the same defect this script's review caught in --acceptance.

• THE WITNESS DID NOT REACH THE STEP — found in review of the implementation, closed at 677fd25. The lane shipped without the regression guard it was created to provide, because neither witness could see a name: --print-plan renders emit_plan | cut -f2-, so the ordering test compared commands with the names cut off, and --self-test hardcodes the string build-crdt in its own synthetic plan, so it proves things about the runner and nothing about the real emitter. Review demonstrated it directly: renaming the real build step to sweep-crdt left both tests passing — a plan that would report a build failure under the sweep's name, sitting green, which is the exact misattribution the separate step exists to prevent.

  The fix is --print-plan-named: a second rendering of the same emit_plan, printing the name<TAB>command text the runner reads back from PLAN_FILE, asserted by whole-line equality so name and command are pinned together, and sweep-crdt's pair asserted too (asserting only the build's name leaves the identical hole open in the other direction). PLAN_FILE remains uninjectable — a test that supplied the runner's plan would turn its eval into a general command executor, the defect the --acceptance refusal exists to prevent — and --self-test stays, witnessing the runner (failure naming, FAILED:, log paths, non-zero exit, continuation via the sentinel), which it may no longer stand in for attribution of the real step. A companion test pins --print-plan as that rendering minus its names, so the two cannot drift into asserting a name the runner never uses. Both new tests are on the no-gates paths.

  Mutated individually, each now red (the first is the one the previous round passed): build renamed build-crdt → sweep-crdt; sweep renamed sweep-crdt → crdt-sweep; build features luajit,crdt → luajit; build emitted after the sweep. Suite is 20 tests.

• AUDITED FOR THE SAME DEFECT ELSEWHERE, and one instance is left open deliberately. Renaming every other plan step — fmt, clippy, lib, m4, gpu, sweep, diff-check, acceptance-<suite> — leaves all 20 tests green: no test asserts any step name but build-crdt and sweep-crdt. For most that is only a log filename and a FAILED: entry. sweep is not: the runner's end-of-run listing globs "$LOGDIR"/*-sweep.log and *-sweep-crdt.log, so renaming that step silently empties the "read these, do not re-run and grep" listing that is the U2/U3 remedy, with the suite still green. Not closed here: the listing only exists on the run path, and every test in this file is deliberately no-gates, so there is no cheap witness for it — recorded rather than papered over.

• Blocks PR #228 (discovery Stage 2). That lane's --protocol result needs re-establishing on a fresh target dir under the repaired script. Deliberately not folded into that feature branch, and it happens after this lands, not inside it.

• Acceptance criterion, witnessed 2026-08-09. scripts/gate --acceptance gate_script_acceptance --protocol on a target root that did not exist (precondition recorded, not assumed): all eleven steps green, 09 build-crdt ok producing debug/pmacs-gpu, and gpu_invocation_acceptance at 15 passed / 0 failed where the same suite was 3/12 without the build step. Zero occurrences of the "build pmacs-gpu" signature in the sweep log, and a54/a37 ran for real rather than taking their skip branches. No manual build anywhere — which is the thing that was false.

• UNEXPLAINED RED, recorded rather than swept up. An earlier attempt at the same cold run failed step 10 with 36 + 4 + 6 + 4 failures across m5_5/m5_6/m5_7/m5_8, all real-daemon suites, all with signature "daemon exited with exit status: 101 before socket appeared; socket=/tmp/.tmpXXXX/pmacs.sock — <stderr empty>". Not the pmacs-gpu signature, and no row in docs/ci-red-signatures.md matches it. Re-running the same test binary from the same target directory gave 36/36 green, which by that registry's own rule establishes intermittence only, never environmental cause — so this stays open rather than being attributed to the load (~25–30 across four concurrent lanes' gates). De-implicated from build-crdt by construction, not by the green rerun: the root crate's default = ["luajit"], so --no-default-features --features luajit,crdt enables exactly the same feature set as the sweep's --features crdt. The build step cannot hand the sweep a differently-featured binary, so it has no mechanism by which to break a daemon suite. Local, not CI, so not a registry row; noted here for whoever sees it next.

• Gates: scripts/gate --acceptance gate_script_acceptance. Note the recursion — this lane edits the script that runs its own gates, so --print-plan, --print-plan-named, --help and --self-test were also checked by hand after each edit: a change that breaks the script cannot be reported honestly by the script. The assertions were mutation tested: wrong features, wrong position, unconditional emission, an aborting runner, the build folded into sweep-crdt, and — added in the second round — a rename of either the build or the sweep step each fail the suite.

Docs absorption after #217 — MERGED as #218 (2026-08-06 09:59Z)

PR #218 — https://github.com/levineuwirth/pmacs/pull/218. This block was written with the lane's first commit, before the PR existed, so the row above was filled in rather than invented. That is the standing correction from #171 (153 commits of drift while invisible here) and #215 (no lane until review caught it): this file requires a lane for every open PR, and the way that stops recurring is writing it now rather than after someone asks.

• Branch docs-absorption-217, base githubsucks/main @ db1bbe9 (the #217 merge). githubsucks/docs-absorption-217 is the authoritative tip — any edit to this block advances past whatever SHA it records, so the ref is the thing to trust. Recover with git fetch githubsucks && git checkout docs-absorption-217.
• Docs only. No src/, no crate, no manifest, no test changes. Gates run are fmt, git diff --check, --lib, and listview_acceptance; the full suite is not re-run for a change that cannot reach it, and that is stated rather than left as a gap.
• Scope: retire the tree and macOS-CI arcs per rule 4, re-home their residue first, file R5 and R6, and carry four durable lessons into the handoff.

Not in scope

Diagnosing R5 or R6, or auditing the three readiness helpers — those are the lanes this one creates, not work it does. Retiring the CI-CRDT, Distribution, or reap-ledger lanes: each still owns undone work and rule 4 does not apply to them.

Empty-content readiness, a fourth and fifth instance — FOR THE R6 AUDIT

Found 2026-08-06 while gating this lane, recorded here because it widens an existing lane's scope rather than starting one.

A loaded --features crdt run failed m6_1_pty_raw_mode_disables_kernel_echo and m6_1_pty_canonical_mode_keeps_kernel_echo with stty -a output was: "" — read-before-write on the child's output. That is the same family as R4 (readiness predicate satisfied by an empty file) and R6 (readiness file never published), and it means the readiness-helper audit's scope is not just three wait_for_file copies under tests/: src/process.rs's own tests carry the shape too.

Both passed isolated and the full suite was green on a quiet machine, so this is load-sensitive and undiagnosed — recorded as a scope note for the audit, not as a registry row: these were local, and the registry judges red CI runs.

Pre-checkout CI reds — a class the registry has no row shape for

Seen 2026-08-06 on #220, three times across two runs (M4+M5, then M5 again on the rerun):

Prepare all required actions
Getting action download info
Failed to resolve action download info. Error: Internal Server Error
##[error]Failed to resolve action download info.

This is not a flake and not a test failure. The job dies inside Set up job, before actions/checkout — a grep for checkout|cargo|test result: over the full job log returns 0. No repo code is fetched, so the red carries zero information about the commit, in either direction.

Two things follow, and both matter for signal integrity:

• Re-running is a first execution, not a retry-to-green. The rerun rule governs a test that ran and failed; nothing ran here. The discriminator is objective and cheap — did the job reach checkout?
• It cannot be a registry row as the registry is written. Matching requires an exact test selector plus fragments, and there is no test. Recorded here rather than forced into a shape it does not fit.

The second M5 failure took 4m52s, which read like a real run; the duration was entirely retry backoff. Duration is not evidence that a job executed — the log is.

Whether docs/ci-red-signatures.md should grow a short non-row section for this class is an open question for its owner, not something this lane decided.

Tree primitive (P5) — MERGED as #217; adoption is the open work

The lane is gone, not the work. Rule 4 removes a lane after merge, and the primitive is merged: listview rows take optional depth and id, collapse is primitive-owned, selection re-seats by id, and the LSP outline is the one adopter. COHERENCE.md §14 is ◐ and §20 says adoption rather than construction, which is where the remaining work is recorded — not here, because none of it is in flight.

What review found is worth carrying forward, since all four were invisible to a passing suite:

• A selection test that toggled the root proved nothing. The root sits on line 1 before and after collapsing, so it passed unchanged under the line-keyed re-seating that id-keyed re-seating replaced. A moving-node witness (tr_4) was the fix.
• TAB was bound on every listview, so flat panels lost their fall-through to the global binding and the Q#P3 read-only intercept. Delegation restored it.
• item was effectively required. line_to_item is sparse when a row omits the optional item, and seat_cursor took # of it — a display-only tree stranded the cursor on the header. Every existing test supplied item, so none could reach it.
• "Opaque, compared by equality" was two contracts. Selection uses ==; collapse keys a table, which consults no __eq. Narrowed to string-or-number, and with it uniqueness and not-NaN, all enforced where rows enter.

The last two are the durable lesson and it is in the handoff: an optional field that a data structure's shape depends on is not optional, and a contract that two mechanisms must honour is only as strong as the weaker mechanism.

Leaked daemons from gpu_invocation_acceptance — NEEDS A LANE

Found 2026-08-05 while cleaning up after the tree-primitive work. No branch, no framing.

• 42 orphaned pmacs --daemon processes were resident on the development machine, the oldest 3 days 23 hours old. All had been reparented to systemd (ppid=1) and all had deleted sockets, so nothing could ever reach or reap them.
• Source: tests/gpu_invocation_acceptance.rs — the one-command tests, whose daemons carry --socket <tempdir>/one-command.sock. The tempdir is cleaned up; the daemon is not.
• Rate measured, not estimated: 3 per sweep. A single isolated --features luajit,crdt sweep leaked exactly three. 42 is what several days of sweeps accumulate to.
• This predates the tree work — the oldest is four days old — so it is a standing leak, not something a current lane introduced.

Why it belongs to the reap-ledger family. This is precisely the shape that lane exists for: a process that outlives its supervisor with nothing left watching it. The ledger arms only for spec.group, and these are daemons spawned by a test harness rather than by compile mode, so nothing in the existing ledger covers them.

Why it matters beyond tidiness. Dozens of resident daemons were present during every local sweep run this week, including the one that produced the unclassified failure recorded in the tree-primitive lane above (and, in full, in that lane's framing §6a). That makes them a rival explanation to the shared-target-dir mechanism for that occurrence, and neither can be tested against it now — the signatures were not captured. A leak that quietly changes the environment of every subsequent test run is a measurement problem as well as a resource one.

First questions for whoever takes it: does the test harness fail to reap, or does the daemon fail to exit when its socket disappears? Those have different fixes, and the second would be a product defect rather than a test one.

macOS CI signal integrity — ARC RETIRED (#215, #216); residue re-homed

Both stages merged and the arc is done, so rule 4 removes the lane. Stage 1 built docs/ci-red-signatures.md and audited the incumbents; Stage 2 retired R2 and R4 with discriminating witnesses. The framing docs/macos-ci-signal-integrity-framing.md and the registry both survive the lane — the registry is the durable artifact this arc existed to produce.

Retiring it required re-homing the residue first, which is why this did not happen at merge. A lane removed while it still owns undone work does not close that work, it hides it. What it owned:

• R1 (supersede cancellation budget, measurement design) → the async-runtime lane, below. Its retirement condition is Q#MCI3: replace or justify the measurement. Widening the budget would make it pass and measure nothing more.
• R3 (live-leader EPERM, UNRESOLVED — possible product defect) → the reap-ledger lane, below, which already parks every disposition change pending exactly this question.
• R5 and R6, added 2026-08-06 and neither diagnosed → the async-runtime lane and a readiness-helper audit respectively.

The rows are the state now, not this block

An occurrence scan on 2026-08-06 (last 25 main runs: 23 green, 2 red) turned up two things worth recording as method rather than as trivia.

A signature very nearly got misfiled by theme. main run 30710662474 is the same test as R3, with EPERM and measured_group=unobservable(ESRCH…) — and R3 requires leader=live where that run reads leader=exited(signal SIGUSR1), which is R2's exact fragment. Read by test name and shared fragments it looks like R3; read by required fragment it is R2, four days before R2's retirement, on the other macOS flavor. Attaching a live unresolved product-defect row to an occurrence of a retired test race is precisely the error the exact-fragment rule prevents, and it was caught by checking the fragment rather than the resemblance.

A second red matched nothing at all and became R5, rather than being folded into R1 because both involve supersede under a deadline on macOS. Sharing a subject is not sharing a signature.

Async-runtime lane — NOT STARTED, owns R1 and R5

No branch, no framing. Owns R1 (Q#MCI3: the 50ms budget starts before the second dispatch and is consumed by the test's own pump, so it measures when the test was scheduled) and R5 (stream_supersede_delivers_cancelled_to_on_close, async pump deadline exceeded, undiagnosed). Filed together because both are the async runtime under a deadline; they are not assumed to share a cause.

Readiness-helper audit — NOT STARTED, owns R6

No branch, no framing. Three independently written readiness helpers now exist, and they disagree: vterm_stage2_acceptance's waits for expected content (hardened by #216), wait_for_published_file was fixed with it, and tests/bottom_panel_stage1_acceptance.rs:2446 carries only the zero-byte half. R4's disposition predicted this recurrence under a new selector, and R6 is it.

Scope is the audit, not the call site: how many helpers exist, whether they can be one, what each promises. Patching acc28 alone leaves the question open under a fourth selector — which is the same mistake as fixing wait_for_file and leaving wait_for_published_file, already made once in this arc.

CI CRDT coverage — MERGED (#209); kept for its three follow-ons

Rewritten, not removed. Rule 4 removes a lane when its ARC is done; the coverage itself has landed but three named follow-ons have not. Durable facts — the corrections, the traps, the census tool — are in docs/agent-handoff.md §§1/5 per rule 3, so they are not repeated here.

• MERGED as #209 (main @ c5f7501, 2026-08-01, two review rounds), framing docs/ci-crdt-coverage-framing.md revision 5. The lane had sat under "NEEDS A LANE" with no branch and no owner since #166.
• CI compiles and runs the CRDT corpus for the first time. Test (crdt) runs 3,766 tests where none ran before; M10 Perf Gates (crdt) covers two suites no workflow had ever named; cargo clippy --features crdt is enforced going forward rather than being a required local gate that rots in CI. 275 of 279 dark tests recovered, the other four excluded with stated reasons.
• Branch ci-crdt-coverage retained; it carries nothing unmerged.

Two CI weaknesses Stage 3 exposed — decisions, not defects

Both surfaced while gating #213 and belong to this lane because it owns the crdt job.

• CI does not pass --no-fail-fast, so a multi-suite break reports as a single-suite one. cargo test halts after a failing binary, so #213's first crdt failure showed one suite when a local --no-fail-fast sweep of the same tree showed thirteen. The Stage 3 census hit the identical trap and recorded it; CI has it too. The cost of the flag is running the remaining suites on a red build, which is usually what you want when diagnosing.
• The crdt job pairs the heaviest build with real-PTY deadlines. It installs lavapipe, builds the full workspace with crdt, runs the largest test count, and includes real-PTY smokes with 5-second waits. #213 saw two different such suites fail on two runs of the same commit. One of those was a real regression the flip caused; the other was load. That ambiguity is the problem — a job where noise and signal look alike trains people to rerun rather than read. The triage half of this is now owned by docs/ci-red-signatures.md — signature-keyed rows and a rerun rule that refuses to treat a green rerun as an all-clear. What remains here is the job-cost question: whether the crdt job should carry real-PTY deadlines at all. Candidate: longer deadlines for real-PTY assertions in this job specifically, or serialize the PTY suites.

Still owned by this lane, not yet done

• The macOS crdt leg. Deliberately ubuntu-only at first, "decide about macOS from evidence." That evidence now exists and is favourable: the non-crdt macOS legs pass at 3,474 (thirteen fewer than ubuntu's 3,487 — cfg-compilation of the Linux-gated process tests, not lost coverage), and no crdt-specific failure appeared anywhere. This is now a small, decidable addition rather than an open question.
• The --lib --features crdt flake. process::tests::setsid_escapee_is_not_reaped_and_teardown_reclaims_readers failed ~1 run in 5 with active_reader_probe returning None. It did not reproduce in #209's runs — --lib --features crdt was 2,081/2,081 and the full serialized sweep clean — but that is not evidence against the hypothesis: every run was --test-threads=1 and the trigger was observed under parallel full-suite load. The drain_until explanation (draining for Started also ticks, and a tick can reap the leader before the following probe) remains an inference from control flow, not a falsified root cause. Its own PR — a product-defect hypothesis, where everything in #209 was workflow configuration.
• InstanceCapabilities::crdt_replica's serde default. #[serde(default = "default_true")] is a third default mechanism, unconditional, and therefore disagrees with the Default impl in a non-CRDT build. Exercising it needs a self-describing format and pmacs-protocol's only serde dependency is postcard, which is not one. Adding serde_json as a dev-dependency to test a divergence #209 did not introduce was refused as scope creep. Parked, not forgotten.
• The two unattributed CRDT failures from #178's round-2 gating. No test names were captured, so there is nothing to reproduce.

Recovery, only if a follow-on needs the branch:

git worktree add ../pmacs-ci-crdt \
  -b ci-crdt-coverage-followup \
  githubsucks/ci-crdt-coverage

Distribution (P8) — STAGE 1 SHIPPED as v1.1.0 (#211)

Rewritten as a lane rather than removed: the arc is not done — Stage 1 was scoped to binaries-on-tag and everything else in §17 is untouched. Framing docs/distribution-stage1-framing.md revision 3. Durable facts are in docs/agent-handoff.md §1.

• Released 2026-08-01. v1.1.0-rc.1 (prerelease) then v1.1.0, both cut from the same commit 000b6cd — the #211 merge SHA — so the final release was built from byte-identical source to the one whose artifacts were verified.
• Verified against the DOWNLOADED artifacts, both tags, not the build logs: archive member lists (exactly pmacs, pmacs-gpu, README, two licenses), executable bits, absence of pmacs-audit / pmacs_fake_lsp / pmacs_fake_mcp, pmacs --version = 1.1.0 and pmacs-gpu --version = 1.1.0 (protocol v21), SHA256SUMS, the glibc floor, and CRDT presence against a non-CRDT negative control (1,576 loro strings shipped versus 0 in a control build — the control is what makes the number mean anything).
• pmacs alone needs only glibc 2.34; pmacs-gpu needs 2.35. The stated floor is the pair's, 2.35, not the more flattering single-binary number. That is why RHEL 9 (2.34) is excluded even though the editor binary would run there.

Still owned by this lane, not yet done

Each is a stated non-goal of Stage 1 (framing §5), not an oversight. The next increment is a decision about which of these the project wants, not a continuation of a plan.

• Channels (stable/nightly), in-place update, rollback.
• Signing and notarization. macOS binaries are Gatekeeper-quarantined today; the release notes say so.
• RHEL 9 and older glibc — needs a container or cross-build, not a runner change.
• Intel macOS, Windows, reproducible builds, package-manager distribution.
• Runtime dependency checking. §17 asks first launch to identify optional external tools; /bin/sh, stty, git and tar are documented and never checked. That is §18 onboarding work.

Discovery lane (P4) — STAGES 1 AND 2 MERGED (#207, #228); LATER WORK REMAINS

Rewritten, not removed, and the PR-specific Stage 2 block above it is retired into this one. Rule 4 removes a lane when its ARC is done; this arc is not. Deleting this lane on the strength of one merged stage would have dropped four named pieces of open work — predicate evaluation, command metadata, help unification, and the prefix decision — which is exactly why the coalesce is spelled out rather than left to judgement. Durable facts from both stages are in docs/agent-handoff.md (§1 for Stage 1; the v23 frozen-variant lesson in §4 for Stage 2).

• Landed, Stage 1: eleven help.* commands over the existing registries, indexed by M-x help, with editor.describe-command / editor.describe-setting kept as forwarders. No Rust, no protocol change. §5 moved substrate-without-surface → Partial.
• Landed, Stage 2 (#228, 0857bf4): M-x rows carry descriptions over protocol v23 — MinibufferPromptRows appended while MinibufferPrompt stays frozen and still sent for 12..=22, gated as a range on both sides so exactly one variant reaches any peer.
• Still open, and the reason this lane survives:
  1. Command gains title / category / aliases / flags / arg-schema — a Rust type change across ~147 definition sites. MCP currently works around the missing schema by stuffing rendered JSON into the description string.
  2. Predicate evaluation. Command.predicate is read at src/help.rs:76 and one test, and evaluated nowhere. Starting to evaluate it makes commands stop being invocable, so it needs its own decision about what "unavailable" means at each call site — M-x, dispatch, menu. discovery_acceptance's d9 pins today's behaviour with a raising predicate, so that stage must change the pin knowingly.
  3. Help-layer unification. src/help.rs is still orphaned. Stage 1 funnels every command through pmacs.editor._show_help and renders via named per-subject functions, so the work is enumerated: replace the four subjects src/help.rs covers (key, mode, hook, buffer) and write three new Rust renderers for settings, lists and apropos.
  4. The help prefix. Deliberately untouched by Stage 1 — the decision is one for the whole family, and C-h is not free (non-kitty terminals cannot disambiguate Ctrl+Backspace from Ctrl+H; both produce byte 0x08). F1 / C-c ? / a rebind are the candidates.
• Two Stage-1 facts a Stage-2 author needs. Completion is assistance, not validation — resolve_accepted_value returns the literal typed text when no candidate is selected, so closed-set acceptance is unbuilt Rust work. And invoke_interactive is not the M-x path; the forwarders learned that the hard way in CI, since pmacs.command.invoke is a real caller of the old names.

Generated-buffer immutability lane (Arc: workbench primitives) — STAGE 1 MERGED; STAGE 2 IS NEXT

Framing #188 (revision 7) and Stage 1 #191 are both on main @ 4cd4a7b. Their durable facts are in docs/agent-handoff.md §1 — including the contract-ownership rule (the framing owns the acceptance criteria; an implementation adopts them and may not restate or narrow them) and why dired/listview were the correct first two families.

• Stage 2 is not started and has no branch. It owns everything with new Rust in it: Buffer::apply_generated_edit + GeneratedOutcome + the { generated = true } option and its run_buffer_edit arm; set_generated_contents reimplemented over it; Q#GB10's path-backed refusal and mark_clean; Q#GB15's identity_protected; Q#GB13/GB18 for compile.lua and the search panel; Q#GB5's ensure_slot lock; the remaining 13 write sites; and the three compile_mode_acceptance intruder tests converted per Q#GB12.
• It collides with dired Stage 2b, which changes paint's callers. Whichever starts second integrates first.

Reap-ledger silent failures — MERGED (#202); kept for its parked follow-ons

• Branch reap-ledger-silent-failures, worktree ../pmacs-reap-ledger, based on githubsucks/main @ 22df6ab. docs/reap-ledger-silent-failures-framing.md, revision 4; approved at revision 3 after two review rounds (round 1: three blocking, two major; round 2: two blocking, two major; all accepted). Revision 4 records implementation findings, not a new design round.

• All four bets resolved. Bet 1 (every site takes a directed outcome) and Bet 2 (every consequence is reachable) hold. Bet 3 resolves the shutdown coupling as real and measured — under 500ms with a failed force-kill plus an errored probe, versus the full 2s bound with only the force-kill failing. Bet 4 is falsified: no reporting channel exists, so reporting becomes its own lane.

• The in-drain pin's first fixture was vacuous, and the bite caught it. poll_one TERMs the group on leader exit, so an untrapped descendant died before writing its late marker — absent on both paths. With the seam reverted the pin failed only the consumed-plan check, never the content assertion. Fixed with trap '' TERM behind the readiness gate.

• Gates: 10/10 green on the pushed tree, all five bootstrap-storage variables controlled — fmt, diff-check, clippy, --lib (1888), --lib --features crdt (2073), compile-mode (67), copy-mode in both feature configurations (18/19), M4 with the basedpyright skip (149), required GPU (221). The five new process pins ran 15/15 as a repetition set, since supervisor tests are load-sensitive.

• Unparked from PR #200's §5. #200 retired the premise that justified the ledger's leniency and deliberately changed no disposition; this lane owns what it refused.

• Now also owns R3, re-homed 2026-08-06 when the macOS CI signal-integrity arc retired. docs/ci-red-signatures.md R3 is a group-directed kill returning EPERM while the leader was observed live, with measured_group — the one field able to disagree — unreadable. It is the same group-target question #176 and #200 circled and this lane parks every disposition change pending, which is why it lands here rather than staying with a retired CI lane. Its registry entry is explicit that it is an unresolved possible product defect and that a green rerun never retires it; that constraint travels with the row, not with whoever inherits it.

  Note what it is not: R2 is the same test with leader=exited(signal SIGUSR1), a test race, retired. An occurrence scan on 2026-08-06 nearly filed a second R2 occurrence here as R3 on the strength of the shared test name and shared EPERM fragment. leader=live is the fragment that separates a product-defect candidate from a fixed fixture bug, and it is the whole reason the row lists it.

• Four sites, not the two #200 named. In the persistent ledger: a probe error of any errno drops the entry and cancels escalation; a failed escalating SIGKILL is marked as succeeded, so no later tick retries it; and shutdown() discards its own force-kill result the same way — on the path that exists specifically to stop a leak at editor exit. Those last two are distinct, not cumulative: shutdown() force-kills every entry with no !entry.killed guard, so a failed escalation still gets one attempt at exit, while a failed force-kill leaks the group past exit with nothing left to try. Plus the in-drain twin final_drain_runtime, which collapses every errno to "dead" while no tick runs; a false "dead" there cancels the readers, so its failure mode is truncated output rather than a leaked process.

• The blast radius is exactly what the ledger exists for: a TERM-ignoring descendant that outlived its leader with output redirected. Neither leader state nor reader state can see it; only group liveness can. A silent drop leaks the one process nothing else is watching. Journey step 9 (build/test), not step 8 — the ledger arms only for spec.group, which spawn rejects for PTY mode, so no terminal reaches it; compile mode is the only production caller.

• shutdown()'s final loop terminates when the ledger empties, which happens via the same silent drop — so the probe error that hides a leak can also end the cleanup loop early. That coupling is why the probe cannot be made strict on its own. Its precondition is any_running() already false, so the fixture must be a leader that exited leaving a survivor; any other shape tests the other arm of the disjunction.

• None of the three has been observed. #200 saw an explicit SIGTERM fail in signal(), not a ledger call. The premise is falsified and the path exposed; the occurrence is not evidence these fire.

• They are also untestable today: tick_reap_ledger and shutdown() call nix directly and consult no injection seam, unlike signal()'s forced_kill_errno. All five existing ledger tests exercise the success path only. The seam must be site-directed and multi-outcome: shutdown() calls self.signal() before its ledger force-kill, so a single global slot would be consumed by the wrong call, and the coupling test needs two pending outcomes at once. The in-drain probe repeats every 1 ms but only cancels readers after 50 ms of false "dead", so it needs a directed full-drain override rather than a one-shot error. Test state is per-supervisor and shared into the drain context, never global; teardown proves its intended site was reached. The in-drain SIGKILL's local flag has no independently observable outer-path consequence, so it is named but not given a dead injection seam. The first PR is the seam plus the tests that exercise it — a seam without tests does not show it reaches the intended calls.

• Diagnosis first, no disposition change proposed. Stage A of the signal lane had three tolerance rules rejected across three revisions for the same shape of error on the same data structure.

• Recovery from a clean checkout:

  git fetch githubsucks
  git worktree add ../pmacs-reap-ledger \
    -b reap-ledger-silent-failures \
    githubsucks/reap-ledger-silent-failures
  

Folding lane (Arc 6) — Stages 1 and 2 MERGED; Stage 3 (GPU) is next

Both shipped stages are on main; nothing in this arc is in flight. Stage 3 has no branch and no framing yet.

• Stage 1 (headless fold engine) merged as #142, Stage 2 (grid/daemon collapse) as #149 — both under "Closed since the last snapshot".
• Retained, carrying nothing unmerged: branches folding / folding-tui and worktrees ../pmacs-folding / ../pmacs-folding-tui. The framings docs/folding-framing.md (rev 5) and docs/folding-stage2-framing.md (rev 4) are the approved artifacts Stage 3 re-scouts against.
• Stage 3 (GPU) obligations, already named by the framings — the starting point for its own framing doc: GPU collapse at TUI parity; caret/hit-test fold-awareness; the BufferSnapshot fold-mirror clear (parent R2-4 — without it, empty-after-revert diff suppression leaves stale folds on the GPU, the same trap class as #120); CRDT-origin and GPU-optimistic interactive unfold (parent R2-3); and flipping FrontendView.fold_projection to true for semantic frontends, which Stage 2 deliberately left false (Q#FD21).

Parked lane: kill-ring browser + persistence

• Portable branch: githubsucks/kill-ring-browser
• Parked framing head: 503c489
• State: framing only, revision 2; no implementation and no PR.
• Status: explicitly parked by the user on 2026-07-20.
• Its original scout was based on 0efb5cd. The preserved framing marks this ground truth stale and requires a complete re-scout against the then-current githubsucks/main before implementation.
• Compile-mode has merged since the original scout, so old “compile-mode in flight” keybinding/touch-set assumptions are not authoritative.

Recovery worktree, only when the user un-parks it:

git worktree add --track \
  -b kill-ring-browser \
  ../pmacs-kill-ring-browser \
  githubsucks/kill-ring-browser

Closed since the last snapshot

• Process-signal diagnostic completeness — MERGED as #200 (main @ a2a92bb), atop Stage A #176. docs/process-signal-diagnostic-completeness-framing.md revision 6; framing approved at revision 4 after three rounds, then five review rounds on the implementation. Durable facts are in docs/agent-handoff.md §1. Evidence collection only — no tolerance rule, no retargeting, no disposition change.

  • Bet 1 was falsified by CI and the framing's own fallback shipped. bash -m diverges the terminal's foreground group on Linux and never on macOS. The divergent case is pinned by injection everywhere; a Linux-only corroboration drives a real shell and is the only test exercising pty_foreground_group end-to-end, so on macOS that lookup has no end-to-end coverage.
  • Group identity remains unprovable, and the pre-kill sample does not change that: moving getpgid before the kill removed a post-hoc reading, it did not make the reading contemporaneous.
  • Still parked, each needing its own lane: the reap ledger's silent cancellation (an EPERM probe drops the entry; a failed SIGKILL is marked killed) — being scoped next; retargeting to the measured pgid; any EPERM/ESRCH tolerance rule; Q#PS6; and signal_target's read-then-kill of tcgetpgrp on the PTY path.

• Six lanes removed by the 2026-07-30 absorption pass, all merged, all with their durable facts in docs/agent-handoff.md §1: #190 resource-op delete-guard implementation; #196 dired Stage 2a (rename/delete reconciliation — Stage 2b remains, unstarted and without a lane); #188 generated-buffer immutability framing (revision 7, the governing contract); #194 silent-skip arming; #195 CI timeouts and concurrency; #197 the process teardown stdin deadlock.

  • #194 and #195 kept their lessons in §3 and §5 rather than §1, which is why a PR-number search of the handoff finds them only once each. That is sufficient under rule 3 — durable knowledge has a home, not a required section.
  • A census by PR number is a proxy, not a measurement. Counting #NNN in the handoff said five of these lanes had no record at all; counting by content found most already documented, with the real gap being the implementation PRs specifically (#190, #191, #196) while their framings were recorded. The absorption written from the first count would have duplicated existing entries.

• Terminal configuration + copy mode arc — BOTH STAGES MERGED, lane removed. Stage 1 #173 (main @ cf54270, one review round) and Stage 2 #178 (main @ fe8b8ba, four review rounds, twelve checks green on head 1b44c69 — verified by head_sha, not by the check summary), both 2026-07-26, both with no protocol change. Approved framing: docs/terminal-config-and-copy-mode-framing.md rev 4, committed as the first commit of Stage 1's branch; its Q#TC6a carries a superseded-in-part box rather than a silent rewrite. Durable facts moved to docs/agent-handoff.md §1 (the arc bullet) and §4 (the set_generated_contents invariant) per rule 3 below, and to COHERENCE.md §14. Stage 2 ships eight of nine criteria and the missing one is named — criterion 17 needs a real GPU frontend, so it waits on the a37 footing; the handoff records what it must assert. Branches githubsucks/terminal-config and githubsucks/terminal-copy-mode with worktrees ../pmacs-terminal-config and ../pmacs-terminal-copy-mode are retained. The gate-run flake found while gating #178 moved to the CI crdt-coverage lane above, which owns its discrimination.

• Dired Stage 1 (the directory view) — MERGED as #165 (main @ c8ec8f3, 2026-07-25, after one review round). pmacs has a directory surface: C-x d / C-x C-j, one read-only buffer per directory named *dired:<canonical path>*, a dired major mode carrying RET/f, ^, n/p, g, q, s. No wire change (v20). The Rust is two things — a per-entry-tolerant read_dir (Q#DR6), which had to be Rust because read_dir_blocking fails a whole listing on any of five per-entry conditions and a tolerant wrapper cannot be written in Lua at all, and normalize_buffer_path going pub as pmacs.path.canonicalize (Q#DR2's preferred end state, so no Lua mirror exists and Stage 2 owes no mirror removal). The frozen m8_1/m8_2/m8_3 counts are unchanged, which is the additivity gate. 15 claims bite-verified; one came back VACUOUS (acceptance 3c cannot pin descent routing — dired holds focus in its own panel, so dedication is the only discriminator) and is documented at the assertion rather than relabelled. Its branch (dired-stage1) and worktree (../pmacs-dired-stage1) are done; the abandoned dired branch (ffdd642, ../pmacs-dired-arc) was superseded by a fresh cut and carries nothing unmerged. Stage 2 (marks and operations) and Stage 3 (wdired) each still need their own framing, and the frozen fixture shrinks after Stage 3. Durable substrate facts and both new ops lessons live in docs/agent-handoff.md §§1/5; the implementation notes are docs/dired-framing.md §0, S1-1…S1-12. Two named forward items for Stage 2: apply_resource_op's rename rebind is exact-PathBuf-equality, first-match-only, looked up with the raw path while stored paths are normalized — so a directory rename strands every buffer under it, and pmacs.fs.rename has zero production callers, so it can be fixed at the primitive; and Q#DR5's seam is the main-thread drain AsyncRuntime::tick, not _take_result, where rename settles as an undifferentiated ReplyKind::FsUnit and so must be keyed on JobKind::FsRename.

• GPU terminal input (the double terminal-layout sync) — MERGED as #166 (main @ b889873, 2026-07-25, one review round, all twelve checks green after a macOS PTY-timing rerun). The dispatcher applied both terminal-layout syncs to every attached frontend; a semantic session satisfies both conditions, so its PTY was resized twice per tick forever and the child took a SIGWINCH storm that made a GPU terminal untypable while output still flowed. sync_terminal_layout is now split into a frontend-kind-neutral half (panel reconcile + controller liveness) and a grid-only geometry half, with the loop body extracted to sync_terminal_layouts_for_tick so the exclusivity is structural. No protocol change (v20). Durable lessons are in docs/agent-handoff.md §5; the framing (docs/gpu-terminal-input-framing.md rev 2) carries three falsified hypotheses, the two-pre-image bite matrix, and two named out-of-scope items (Q#GT5 interactive-shell echo on a raw PTY, which reproduces in-process and so is not the GUI/TUI asymmetry; and a geometry change appearing to clear the visible screen, which reproduces pre-fix). Branch gpu-terminal-input and worktree ../pmacs-gui-term-input retained. Its landed-doc pair MERGED as #168 (main @ 1b6a084, 2026-07-26): #166 recorded as landed, the CI crdt-coverage gap measured (264 tests dark workspace-wide, 177 in the library — a reading taken at 1b6a084 and kept here only as history. The CI crdt-coverage lane above is the authority for the live figure; do not quote this one forward), the vterm audit corrected — "only 3 of 9 acceptances drive a real daemon" was optimistic; without the frontend binary the honest number is 2 — and the a37 findings folded into the coverage lane.

• Inline-math slice — MERGED as #158 (main @ 5aa9044, 2026-07-25). Detect → parse → layout → draw for $…$, entirely inside pmacs-gpu, no protocol change. Verified by the user's manual pass on a real paper after the landing. What is worth carrying forward:

  • The v0 subset is 34 Greek symbols, sub/superscript, and \frac. An unsupported command fails the whole span back to source, so on a real document most inline spans still show LaTeX. Widening the symbol map is the highest-value next increment — ahead of display math, which is also deferred.
  • A stale frontend binary is invisible from the source tree. The slice lives only in pmacs-gpu, so after it merged the feature was absent until cargo build --release -p pmacs-gpu and a client restart; the daemon needs neither. Diagnose with strings on the binary (Latin Modern Math, MathBox) rather than by re-reading the checkout, which was already current.
  • Main was integrated three times in one day (8c86d34, 46a1b8f, b889873), merged not rebased to preserve review anchors. Two conflicts, both this ledger and nothing else. The dangerous case was the one that did NOT conflict: #166 auto-merged into pmacs-gpu/src/main.rs, the file this lane rewrites, because the two edits sat in different regions of it. Decide whether to integrate from the shared-file set, never from whether git complained.
  • Integration was proved by test-count reconciliation, not by a green run: predict what the other side adds, then check the deltas. GPU 199→202 matched e547a90's 3; later lib 1,826→1,829 and CRDT 2,003→2,006 matched #166's 3, with GPU unchanged because #166 adds none. Suites 91→92 was #161's new binary.
  • Why the branch had no CI for a day: a conflicting PR builds no merge ref, so no pull_request run is created. The ledger previously recorded this cause as unidentified; it is not. Check mergeable and confirm a run exists for the current head SHA.
  • m4_5_basedpyright has no timeout and hangs forever, parking a --workspace sweep (observed 2h26m at 38 of 92 suites). It is intermittent, so an earlier clean sweep proves nothing. Sweep with cargo test --workspace --no-fail-fast -- --skip basedpyright and judge progress by whether the suite count advances.
  • Named v0 approximations: the peer-caret half of acceptance 14 is pinned at the mapping level, not pixels; a soft-wrapped spacer draws its box whole at the first run's origin; the fit budget reads the bundled code face even under a custom set_font family.

• Bottom panel Stage 1 — MERGED as #155 (main @ e745068, 2026-07-24, after two review rounds). Window placement, window parameters, TUI side windows, the divider, and the adopter display opt-in, with no protocol change. Both rounds found the same class of defect and are worth keeping:

  • Round 1: the Q#BP6 side-window split guard had no production caller — C-x 2 still reached plain split_active — and survived because the acceptance test called the core method directly.
  • Round 2: Q#BP7's terminal growth re-arm had never been implemented, and the assertion meant to pin it (at_bottom) is a geometric readout that a still-anchored view satisfies; the anchor assertions beside it compared "" with "" because the PTY fixture emitted LF-only output.
  • Post-round-2 self-review, caught by CI going red on all four Test jobs: resolving pmacs.window.buffer()'s no-argument arm through the acting frontend made a total function partial, and six runtime modules silently dropped operations (kill_ring_acceptance 30/30 → 25/5). Fixed in 9110f9f before merge.
  • Gating fact found on the way: an isolated XDG_CONFIG_HOME prevents the real user init.lua from installing a local package and leaking a status message into painted-frame comparisons. That isolates the observed config symptom only, not the gate: the ambient-root lane above establishes that data/state/cache must be controlled too. There is also a latent pre-existing main bug in the buffer CRDT undo path, unrelated to this arc.
  • compile_mode_acceptance is load-sensitive under default parallelism (~1 run in 3, a different test each time); verified pre-existing by swapping in main's compile.lua. It is 67/67 at --test-threads=1.

• GPU initial target — MERGED as #148 (main @ 0dd16a5, 2026-07-24, after two review rounds). pmacs --gpu [--socket …] FILE opens a target before the GPU window appears. Protocol bumped 19 → 20: a semantic-session SessionBootstrapRequest after AttachRequest, plus an appended InstanceMessage::InitialTargetResult pre-window readiness barrier; v6–v19 wire encodings are unchanged. Root owns launcher tilde/cwd resolution and exact raw-byte path transport; the daemon resolves/dedups/loads the target and runs load/switch hooks inside one dispatcher transaction, then publishes CRDT-upgraded targets to existing grid replicas (gated on upgraded_to_crdt, independent of the load/create outcome, so a dedup onto a hidden not-yet-backed buffer still reaches pre-attached replicas — round 2 finding). Semantic replicas receive a publication only when displaying that buffer, so a second target launch cannot switch an existing GPU window. Round 2 also closed a failure-containment gap: every dispatcher-side bootstrap failure now shuts down the socket (a dropped write-half clone does not close a shared FD), and the dispatcher drops any event from a session that was never installed, rather than reaching absent render/size state. Integrated cleanly with Folding Stage 2 (#149): fold projection at attach is selected from the same negotiated semantic_render bit the target bootstrap uses. Its lane, worktree (../pmacs-gpu-initial-target), and branch (gpu-initial-target) are done; the -framing branch is kept. Durable substrate facts and both review-round lessons live in docs/agent-handoff.md §§1/5 and docs/gpu-initial-target-framing.md rev 3.

• Folding Stage 2 (grid/daemon collapse) — MERGED as #149 (main @ 6ed4fe9, 2026-07-24, after five review rounds). The grid TUI now renders collapses. Spine (Q#FD12): src/fold_view.rs's VisibleLineMap, derived from the fold store plus a window's line offsets and never stored, threaded as Option<&'a VisibleLineMap> on a lifetime-bearing Viewport<'a> that stays Copy. No wire schema or protocol change; the GPU path is Stage 3. 48 acceptance tests on the real paint_frame grid, every behavioral claim bite-verified. Durable design points, each a trap Stage 3 inherits:

  • the map's unit is a merged hidden component (overlapping or adjacent intervals unioned, keeping the earliest visible head), not a fold — folds may cross, and a later fold's own head can be hidden;
  • instances are per rendered window and per command/event operation, never per frame; a command's map follows the operation's target window, since a wheel event names a pane without activating it;
  • fold projection is per-frontend (FrontendView.fold_projection) — shared EditorCore motion would otherwise make a simultaneous unfolded GPU session's cursor skip lines it still displays;
  • a hidden cursor normalizes by position, not row, and set_view_top clamps in the setter rather than being repaired at render time;
  • the interactive-Lua unfold keys on the post-intercept edit site — a managed buffer intercept may legally relocate the op.

  Process notes worth keeping: main moved under the arc, and the merge was textually clean but not semantically clean (#146 added Viewport literals the new folds field invalidated) — a clean git merge-tree does not mean the merged tree compiles. CI was red at review on the macOS/luajit outline_5_level_100_entry_renders_within_100ms budget flake and went green on rerun.

• Documentation ledger refresh — MERGED as #147 (main @ 0a479ae, 2026-07-24). The #142 housekeeping, expanded after review found the ledger stale through four merges rather than one. Its own macOS/luajit red was the vterm VTERM_ALT_READY PTY timeout; green on rerun.

• Web grammars HTML + CSS — MERGED as #146 (main @ 47581f4, 2026-07-23). .html/.htm/.xhtml and .css highlight off the official tree-sitter-html 0.23 / tree-sitter-css 0.25 crate query constants (no in-repo overlay), and HTML's INJECTIONS_QUERY lights up <script> → js and <style> → css. Durable lesson recorded in docs/web-grammars-html-css-framing.md: the highlight.rs capture table is global, so adding a capture name retro-paints every other language — check the reverse direction and pin it.

• LaTeX Stage 1 — MERGED as #144, with its parent inline-math framing committed as #145 (main @ f09b0a1, 2026-07-23). .tex/.latex/.sty/.cls highlight via codebook-tree-sitter-latex 0.6 plus the first in-repo query overlay (builtin/queries/latex/highlights.scm, include_str!) — the reusable pattern for grammars whose crate ships no usable queries. The crates.io tree-sitter-latex is provably broken (no scanner.c). The math parser and Tiers 3–4 are deferred to the inline-math arc.

• Folding Stage 1 (headless fold engine) — MERGED as #142 (main @ c49a8c7, 2026-07-23, after three review rounds; round 3 clean). The instance-side fold store + translating/dropping View, the structural source (derived head line, closer-aware tail), the Lua data API + interactive C-c @ commands, the command-path pre-edit unfold, and authoritative-empty FoldState production landed with no protocol bump. The folding branch and worktree (../pmacs-folding) are retained but carry nothing unmerged; the folding-framing.md framing is preserved. CI red at merge was an unrelated environmental perf flake (outline_5_level_100_entry_renders_within_100ms, macOS/luajit only), green on rerun. Stage 2 has since merged as #149 (above); durable substrate seams live in docs/agent-handoff.md §1.

• Vterm Stage 3 (protocol v19 + GPU terminal) — MERGED as #135 (main @ cac4961, 2026-07-22, after two review rounds). Arc 5's terminal stage is complete (compile mode #113, Stage 1 #126, Stage 2 #130, Stage 3 #135). Its lane, worktree (../pmacs-vterm-gpu), and branch are done; durable substrate facts live in docs/agent-handoff.md and docs/vterm-framing.md.

• Branches deleted 2026-07-22 (authorized): vterm-stage3-framing (Revision 8 framing; its content is carried on vterm-gpu, verified as a superset before deletion — the branch was NOT an ancestor of vterm-gpu because the framing was copied rather than merged, so it needed a forced local delete) and tab-width-parity (a clean ancestor of main via #137). Both removed as worktree + local ref + githubsucks ref; the origin tracking refs were pruned. The -framing branches for each are deliberately kept.

• Tab-width rendering parity — MERGED as #137 (main @ 2625ec7, 2026-07-22). One fixed 8-column TAB_STOP_COLUMNS in pmacs-protocol now drives core/TUI columns, GPU code projection, and minimap width; source bytes and protocol ranges are unchanged. Its lane, worktree, and tab-width-parity branch (local + githubsucks) are deleted; the tab-width-parity-framing branch is kept. This closes the long-standing "tab width is a rendering-parity bug, NOT a config gap" deferral recorded in docs/agent-handoff.md §5.

• Locals-query processing — MERGED as #134 (with handoff #136), and modeline detection handoff #133. Both landed between this lane's base and its canonical-main integration.

• Config registry — MERGED as #127 (main @ 2e37c04). Its lane (config-registry, worktree ../pmacs-config-registry) is done; the branch is kept but carries nothing unmerged. Durable substrate facts moved to docs/agent-handoff.md §1 per rule 3 below.

• Both this and Vterm Stage 1 ran as concurrent lanes in sibling worktrees off main, with the shared files (src/editor.rs, src/lua_bindings/mod.rs, src/lib.rs) assigned to one lane each in advance. The rebase of the second lane onto the first had zero conflicts — worth repeating for future parallel work, along with its precondition: agree the file split before either lane starts, and keep each lane's footprint in the other's files to a single line.

Update protocol

Whenever a listed lane changes materially:

1. update its public branch and head/state here;
2. record new verification and remove superseded caveats;
3. keep durable architecture in docs/agent-handoff.md, not here;
4. remove the lane after merge or abandonment;
5. verify every recovery command from a clean worktree before calling the transfer complete.