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 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 @ 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..=v22; the production server-first Hello still advertises v20 — two different facts, and #184 landed only the first. The upper bound moved to 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 9a26ac8 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 9a26ac8 — 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.

This path was exercised, not asserted, at this snapshot — re-run from an empty directory on 2026-08-08 when the base advanced to 9a26ac8, rather than having its SHA swapped. 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. git clone the canonical URL, add the githubsucks alias, git fetch githubsucks --prune, confirm 9a26ac8 is an ancestor of githubsucks/main, and recover with the three-argument git worktree add <path> -b <local> githubsucks/<branch> form. All four steps ran clean.

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.

scripts/gate — PR #225 OPEN (build tooling)

PR #225 — https://github.com/levineuwirth/pmacs/pull/225. Written after the PR existed, again, and again because review asked. Two lanes in a row have now been added late; the correction from #171 and #215 is not sticking, and recording that is more useful than a back-dated block that pretends it did.

• Branch gate-script, base githubsucks/main @ b833b13 (the #224 merge). githubsucks/gate-script is the authoritative tip — the ref, not a SHA. Recover with git fetch githubsucks && git checkout gate-script.
• Framing docs/gate-script-framing.md, approved at revision 4 after four review rounds; revision 5 records two safety defects found against the implementation, not the design.
• Scope: scripts/gate (per-worktree CARGO_TARGET_DIR, five ambient roots, durable per-gate logs, the fixed gate suite), tests/gate_script_acceptance.rs, and a handoff §3 rewrite pointing at the script while §3 keeps policy and acceptance-suite selection. No src/, no crate, no manifest, no protocol.
• Verification: 15 acceptance tests over the no-gates paths, each isolated by PMACS_GATE_TARGET_ROOT. Mutation-tested; the two prune guards are redundant by design and only fail the test when both are removed, which is recorded in the test itself. Observed real runs confirm failed-gate naming, log paths, ambient creation and reaping, and distinct log directories per run.

GATE STATUS — R8 RESOLVED. This lane was blocked because scripts/gate exited 1 on a clean tree: R8 failed m4_acceptance and therefore the sweep. That was never a footnote — #225 is the lane that makes the gate suite authoritative, and a tool shipping with its own gate red teaches the opposite of what it exists to teach.

R8 was fixed and retired in #226 (dcb852e), which bounded the LSP fixture's project detection. This branch is rebased onto it.

RE-GATED 2026-08-09: scripts/gate exits 0. All nine gates green in one command — fmt, clippy, --lib, --lib --features crdt, both named acceptance suites, m4_acceptance, -p pmacs-gpu, and the full workspace sweep. That is #225's own acceptance criterion, and it is the first time the tool has passed the suite it exists to run.

Rebase resolution, per the standing rule that #226's R8 documentation wins. Three conflicts, all in R8 text this branch had written while the row was still an open investigation: two in docs/ci-red-signatures.md (both resolved to #226's retired row, this branch's pre-fix copy dropped), and the framing-doc pair (e71e1bd added it, 7cfba73 removed it — both skipped, since they are net-zero here and main owns the file authoritatively; replaying the second would have deleted main's copy). Two now-stale lanes were also removed: this branch's "R8 NEEDS A LANE" investigation block, and #226's own lane, which Rule 4 retires now that it has merged — its durable facts are in the retired registry row and the handoff §6 census.

Worker identity Stage 1 (§9) — BRANCHED, pre-implementation

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 the first two. A parent needs an ambient "currently-running job" context, and an unpopulated parent reads as "no parent" rather than "not tracked" (Q#W-5).
• Gates: scripts/gate --acceptance <the new suite>. No --protocol.

Discovery Stage 2 — PR #228 OPEN, MERGE-BLOCKED

PR #228 — https://github.com/levineuwirth/pmacs/pull/228. Opened 2026-08-09 at 2d298dd. Open for review, not for merge.

The block is a gate-integrity problem, not backlog hygiene. This lane's gate is scripts/gate --protocol, which promises the CRDT workspace sweep. That sweep's documented precondition is cargo build --workspace --no-default-features --features luajit,crdt (handoff §5), and the script does not run it — confirmed by reading its plan emitter. On a fresh per-worktree target directory the sweep fails on twelve gpu_invocation_acceptance tests missing the pmacs-gpu binary, so a --protocol result can be decided by the state of the build directory rather than by the diff.

Latent until #225 gave each worktree its own target dir — a shared one usually already had pmacs-gpu built, satisfying the precondition by accident. It surfaced on this branch's first gate run.

Unblocking requires both: the scripts/gate repair, in its own narrow framing and its own PR (explicitly not folded into this feature branch), and then a fresh-target rerun of this branch's protocol gate under the repaired script.

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

Branch discovery-stage2, base githubsucks/main @ 4bc55e8 (the #225 merge). githubsucks/discovery-stage2 is the authoritative tip — the ref, not a SHA. Recover with git fetch githubsucks && git checkout discovery-stage2.

• Framing docs/discovery-stage2-framing.md, revision 3, APPROVED 2026-08-09 after three review rounds. Each round found the previous one reasoning about a mechanism instead of reading it — an in-place field change that postcard cannot make compatible, a TUI that never reads the message at all, a round-trip test that freezes nothing, a cache hazard the per-peer render state makes impossible, and a clipping rule unachievable at narrow widths. Scope: COHERENCE.md §5's "M-x rows are still bare names". Descriptions already exist on Command and are already rendered by help.list-commands; they are missing at the one moment they would change a decision.
• PROTOCOL BUMP v22 → v23, and this lane HOLDS THE BUMP SLOT. Additive: a new MinibufferPromptRows variant appended to the enum, with MinibufferPrompt frozen for v12–v22. An in-place field change is a wire break — postcard encodes positionally, and that variant is sent to every peer >= 12 (src/daemon.rs:1472).
• Git Stage 2 (gutter markers) also needs a bump and must wait for this to land. Git Stage 1 is no-wire and runs beside it.
• Two halves, only one of which is wire work. pmacs-gpu renders the new variant. The grid TUI never reads MinibufferPrompt at all — it paints from core.minibuffer and renders format!(" [{cand}]") (src/editor.rs:5484), so its half is a local formatting change reading the registry directly. A multi-row TUI chooser is explicitly NOT this lane.
• Gates: scripts/gate --protocol --acceptance discovery_stage2_acceptance --acceptance m9_6_acceptance --acceptance m9_7_acceptance --acceptance m9_8_acceptance — the strengthened two-configuration sweep, which is what --protocol exists for. The three m9 suites are named because the PR #228 review round measured them as this change's blast radius (see the description-clip bullet); their continued passing is on the record rather than assumed. --protocol does NOT run its own documented precondition (cargo build --workspace --no-default-features --features luajit,crdt, handoff §5) — run it by hand first or twelve gpu_invocation_acceptance tests fail on a missing pmacs-gpu binary. That omission is the gate-protocol-build lane's, not this one's.
• IMPLEMENTED. PROTOCOL_VERSION is 23, ADVERTISED_PROTOCOL_VERSION is untouched at 20. New suite tests/discovery_stage2_acceptance.rs; the daemon half is crdt-gated (a semantic session is necessarily a text replica) and runs one daemon serving a v22 and a v23 session simultaneously.
• Multi-line descriptions are clipped AT THE SURFACE, and registration-level rejection was investigated and REJECTED ON EVIDENCE — do not re-propose it. PR #228 review found the real hazard: the GPU dropdown derives its height, visible window and highlight offset from rows.len() (one logical row per candidate), so a detail carrying a line break misaligns every row below it; the TUI writes into a single-row band. The obvious fix — reject CR/LF in CommandRegistry::define — was implemented and measured, and it fails 36 tests across m9_6/m9_7/m9_8, because MCP tool registration renders a whole schema block into description (tests/fixtures/pmacs-mcp-tools/init.lua:272, table.concat(lines, "\n"), used at :496) and tests/m9_6_acceptance.rs:583-598 asserts four separate lines of it — tool text, Arguments:, and two per-argument lines. No single-line rendering satisfies those assertions, so a registry guard could only go green by deleting a shipped acceptance criterion. The one-line constraint belongs to the surfaces that have it: Command::description_first_line clips, both single-row consumers call it, and the full text still reaches describe-command / help.list-commands untouched. Precedent already in-tree — the same MCP fixture clips a tool RESULT to its first line because "a multi-line set_status would corrupt the row layout" (:277-285). A startup census is not a corpus census: booting an EditorState and scanning all 180 registered descriptions found zero offenders, because MCP registers at RUNTIME and builds the string by concatenation — invisible to both that census and a grep for literals. The workspace sweep is what caught it.
• The freeze is enforced by LITERAL byte fixtures, not a round-trip — minibuffer_prompt_v12_wire_bytes_are_frozen in src/protocol.rs, the first such fixture in this repo. Bite-verified: reordering two fields of MinibufferPrompt leaves minibuffer_prompt_round_trips_through_postcard passing and fails the fixture, which is exactly the hazard a round-trip cannot see.
• Version assertions updated (five, each read before editing): src/protocol.rs — the PROTOCOL_VERSION == 22 tripwire (renamed protocol_version_is_twenty_three_for_minibuffer_prompt_rows) and supported_protocol_versions_resume_ladder_on_v6_floor's accepted/rejected ranges; tests/statusline_segments_acceptance.rs (version + supported range + the !supported ceiling); tests/bottom_panel_stage2b_gpu_acceptance.rs; tests/vterm_stage3_acceptance.rs. No ADVERTISED_PROTOCOL_VERSION assertion fired, which is the pin doing its job.
• No cross-version cache test, deliberately (framing §3.2/§6): SemanticRenderState::for_peer bakes the negotiated version in at attach and is dropped at detach, so a cache cannot span two versions. A test for an impossible condition passes forever while teaching the next reader that the hazard is real.

LSP LaTeX coverage — IMPLEMENTED, gates green, no PR yet

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

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

• Framing docs/lsp-language-coverage-framing.md, revision 3 — IMPLEMENTATION AUTHORIZED 2026-08-09, after a summary of its four corrections rather than a findings round on the document itself. Recorded that way deliberately: the §3 .texlabroot verification caveat was live and binding, and was step zero of the work rather than a footnote it could be read past. It is now discharged — see below. Revision 1 was UNTRACKED on main in one checkout and therefore did not travel; committing it here is the fix.
• Scope: one pmacs.lsp.config.latex entry plus its root resolver. texlab 5.25.1 is installed and unused; a .tex buffer highlights correctly and offers no completion, diagnostics, or go-to-definition.
• Revision 2 found Slice 1 is SMALLER than revision 1 framed. The proposed .tex/.latex/.sty/.cls filetype mappings are redundant: the grammar already carries exactly those extensions (src/syntax.rs:1111), grammar-extension detection sits ahead of the LSP filetype map in the precedence chain (docs/latex-grammar-math-substrate-framing.md:166-171), and lsp.lua:267-270 calls that map "mainly the LSP-only fallback". The two systems cannot disagree, because the grammar's extension list is what drives detection.
• Two other corrections. haskell-language-server is installed on this machine — revision 1 said it was not, which was the whole basis of its Slice 1 / Slice 2 split. And Q#LX3's deferral argument read COHERENCE.md:1669 ("first slice in flight") when :124 and :867 both record multi-root affinity as merged (#161); that line contradicts the same document twice and wants a separate fix.
• Q#LX2 (the LaTeX root) is answered. An upward marker walk through config.latex.root, which already accepts a resolver function (lsp.lua:543), falling back to the file's own directory. .git is deliberately excluded: a repo root is the wrong answer for LaTeX, and it is the one place copying the other fourteen entries' instinct is actively wrong.
• STEP ZERO IS DISCHARGED — §3's .texlabroot caveat, by observation. Marker 1 ships, and the framing's premise for it was corrected in the process.
  • .texlabroot is a real texlab marker. texlab v5.25.1's crates/distro/src/language.rs maps .texlabroot/texlabroot → Root, Tectonic.toml → Tectonic, .latexmkrc/latexmkrc → Latexmkrc; ProjectRoot::walk_and_find (crates/base-db/src/deps/root.rs) walks ancestors testing all three, innermost wins. The shipped marker set is texlab's own, including the bare texlabroot/latexmkrc spellings the framing did not list.
  • But texlab cannot apply that walk to fix a root pmacs gets wrong, which is the correction that matters. Each arm searches workspace.iter() — documents ALREADY LOADED — and the workspace comes from the folders the CLIENT supplies. Hand-driven LSP sessions confirmed it: with rootUri at a chapters/ subdirectory, no marker above it (.texlabroot included) widened texlab's view and its dependency graph never reached the parent document; with rootUri at the marker directory the parent resolved, marker present or not. texlab honours the root it is handed and never corrects a too-narrow one, so what config.latex.root returns is the project scope. That makes the resolver the whole value of the lane rather than a nicety.
  • args = {} is also observed, not assumed: bare texlab answers initialize with TexLab 5.25.1 over stdio, so the run subcommand is not needed.
  • §3 said the wrong thing and has been corrected — b5eaf27 IS revision 3. It framed marker 1 as conditional on texlab honouring the .texlabroot file, when the operative fact is that texlab honours the client-supplied root and never widens it. The caveat was discharged by observation, and revision 3 records what that established. Nothing about §3 is outstanding.
• .git exclusion needed more than omitting it from the list. project_root_for falls through to pmacs.project.detect when a resolver returns nil, and that walk includes .git — so a resolver declining on a markerless file would hand texlab the repository root by the back door. The resolver therefore never declines for a file that has a directory. Pinned end to end through attach, with the same fixture asserting the shared detector really would have answered the repo root.
• Commit a9ef37f — builtin/runtime/lsp.lua plus tests/lsp_latex_acceptance.rs (14 tests, one per §6 bullet plus the boundary and decline cases). No settings/init_options (Q#LX1); no filetype mappings (§2, asserted both ways).
• Gates: ALL GREEN via ./scripts/gate --acceptance lsp_latex_acceptance — fmt, clippy, lib, lib-crdt, the new suite, m4, gpu, the workspace sweep (115 suites, zero failures), diff-check. No --protocol — a config entry, no wire.
• Seven mutations each fail the suite: resolver declining on no marker (6 tests), no marker walk (4), a redundant filetypes.tex (1), boundary ignored (1), io.open truthiness so a directory counts as a marker (1), marker set narrowed (4), command renamed with opinionated settings added (1).
• The boundary has now been the interesting part twice, and the second time it was a real defect (fixed in review). First it was hermeticity — every fixture sets set_search_boundary at its own tempdir because R8's shape (a stray latexmkrc above the tempdir) would make the markerless assertions pass while testing nothing. Then review found latex_within_boundary answering a PATH question with string arithmetic: dir:sub(1, #boundary + 1) == boundary .. "/" compares against "//" when the boundary is /, which no canonical path matches, so a root boundary judged every ancestor out of bounds, ran no marker walk at all, and gave each chapter of a thesis its own server — the lane's headline behaviour silently off, with every shipped test still green because each one clamps to a tempdir. The same trap sat at the other end (/ was never a walk candidate, and /paper.tex sliced to an empty directory and declined into the .git-aware detector). Now segment comparison throughout: the root is a boundary with zero segments, contained by construction rather than by a special case. Pinned by an ATTACH-level test under a / boundary — two chapters, one server, marker root — and the hermeticity property asserts both directions, since "stops at the boundary" is also satisfied by a walk that never runs. Suite is 16 tests. A reader deciding whether to trust this resolver should read it as: the marker set and the .git exclusion were settled by observation and are solid; the boundary arithmetic around them was not, and is the place to look first if roots come back wrong.
• Trap for the next agent in this worktree: this machine exports a shared CARGO_TARGET_DIR, so a bare cargo test compiles against a sibling worktree's artifacts and fails with errors from code that is not in this tree. Use scripts/gate, or CARGO_TARGET_DIR="$(./scripts/gate --print-target-dir)" for ad-hoc runs. scripts/gate's own header documents this; the failure looks like a broken branch, which is why it is recorded here.
• No PR opened, by instruction.

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. ||||||| parent of 72bbb96 (docs: LSP LaTeX coverage framing revision 2, on a branch at last) ||||||| parent of 312ec7a (docs: frame Discovery Stage 2 (revision 2) — M-x rows) ||||||| parent of 8f86908 (docs: frame worker identity Stage 1 (revision 1))

QoL arc retirement — PR #224 OPEN (docs only)

PR #224 — https://github.com/levineuwirth/pmacs/pull/224. Written after the PR existed rather than with the lane's first commit — which is the standing correction from #171 and #215 being missed again, and it took review asking. Recorded that way rather than quietly back-dated: this file requires a lane for every open PR, including the PR that retires other lanes.

• Branch retire-long-lines-lane, base githubsucks/main @ 9a26ac8 (the #223 merge). githubsucks/retire-long-lines-lane is the authoritative tip — the ref, not a SHA, since any edit to this block advances past whatever SHA it records. Recover with git fetch githubsucks && git checkout retire-long-lines-lane.
• Docs only. Two files, docs/active-work.md and docs/agent-handoff.md. No src/, no crate, no manifest, no test changes.
• Scope: Rule 4 for the QoL arc, closed at #223. Remove the three merged lane blocks (long lines, Stage 1 #219, Stage 2 #220) after re-homing their durable residue to the handoff; advance the handoff's date and main anchor and this file's canonical-base record and recovery floor; add capability-aware keymap resolution as a named handoff §6 backlog item — cross-cutting, not started, needs its own framing.
• Verification: git diff --check clean. The recovery path was re-exercised, not SHA-swapped — fresh clone into an empty directory, githubsucks alias, --prune fetch, 9a26ac8 confirmed an ancestor of githubsucks/main, worktree recovered with the three-argument form; all four steps clean. Swept for dangling references to the removed lanes and their branches. The full gate suite is not re-run for a change that cannot reach it, and that is stated rather than left as a gap.
• Retire this block in the next absorption after #224 merges. It describes a docs PR; once merged there is nothing volatile left.

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) — STAGE 1 MERGED (#207); STAGE 2 IS NEXT

Rewritten, not removed. Rule 4 removes a lane when its ARC is done; this arc is not — Stage 1 built the command surface and everything that needs a Rust change is still ahead. Stage 1's durable facts are in docs/agent-handoff.md §1.

• Landed: 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.
• Stage 2 candidates, in rough dependency order:
  1. Richer M-x rows — a protocol change: MinibufferPrompt.candidates is Vec<String>, while CompletionPopupRow already carries kind/detail, so the wire pattern is solved and the bump is the work.
  2. 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.
  3. 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.
  4. 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.
  5. 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.