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Active work — cross-machine resume ledger

Snapshot: 2026-07-30. 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.

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 @ 7586905 (the docs-only coherence listview correction #189, atop the docs-only landed-state refresh #185, the M4 config-sink race fix #174, bottom-panel Stage 2B-1 #184, the Journey/GPU directory-target ratchet #183, Journey Stage 1a #182 and the previously recorded landed work). Protocol schema support is v6..=v21; the production server-first Hello still advertises v20 — two different facts, and #184 landed only the first. The previous snapshot named 0442d78, and the recovery floor advances with it: the check below now requires 7586905 or newer, so a tree at 0442d78 no longer passes. That is deliberate — the floor moves with the base, because a check that accepts 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 7586905 — 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.

The CRDT half of the test corpus is dark in CI — NEEDS A LANE

  • No branch, no framing yet. Found while gating #166, then measured properly during the vterm as-framed audit. Deliberately kept out of #166 so a CI change would not arrive after review approval.

  • Root cause: .github/workflows/ci.yml never enables the crdt feature anywhere — zero hits across the workflow directory. The test job runs cargo test --all-targets --no-default-features --features luajit|lua54. Every #[cfg(feature = "crdt")] test is therefore not compiled in CI, not merely skipped.

  • Measured, --list under CI's exact flags versus the same flags plus crdt: 3,176 vs 3,449 — 273 tests dark. Re-measured at 74301d1 (2026-07-26; at fe8b8ba it read 3,170 vs 3,443, the same 273 dark — #176 added six tests, none of them crdt-gated). The number moves with every merge and must be re-measured, not quoted. #168 reported 3,024 vs 3,288 — 264 dark, 177 in the library — at 1b6a084; #178 then added CRDT-only generated-buffer coverage, and other lanes landed CRDT tests in between. Per target:

    dark CI full target
    185 1,848 2,033 the library itself (src/lib.rs)
    21 15 36 m5_5_acceptance
    13 1 14 gpu_invocation_acceptance
    13 1 14 gpu_initial_target_acceptance
    8 0 8 m10_11_acceptance
    6 0 6 auto_pair_crdt_acceptance
    6 0 6 m10_2_perf
    4 5 9 vterm_stage3_acceptance
    4 0 4 m10_10_perf
    3 0 3 compile_mode_crdt_acceptance
    2 22 24 theme_faces_acceptance
    2 0 2 m11_5_semantic_acceptance
    1 14 15 terminal_copy_mode_acceptance
    1 9 10 vterm_stage1_acceptance
    1 7 8 statusline_segments_acceptance
    1 10 11 gpu_font_acceptance
    1 0 1 auto_indent_crdt_acceptance
    1 0 1 m10_11_perf

    The rows sum to 273; the table is the whole census, not its head.

  • The single worst line is the library. cargo test --lib --features crdt is a REQUIRED local gate in CLAUDE.md, and CI has never run it. 185 library tests — the whole CRDT half — are developer-machine-only, and that count grows with every merged branch that adds a crdt-gated unit test.

  • Ten suites run zero or one test in CI, including gpu_initial_target (#148's entire acceptance, 1/14), gpu_invocation (#141's, 1/14), and a37, the Vterm Stage 3 real-daemon/real-PTY/real-wgpu path that #135 built specifically because "a decoded-message fixture would prove none of the three fit together".

  • ⚠ a37 will report green in the new job without running, unless the job builds pmacs-gpu AND sets PMACS_REQUIRE_GPU=1. Measured 2026-07-26 while gating #173. a37_real_daemon_real_pty_and_headless_gpu_ render_one_terminal_session derives its sibling binary path from CARGO_BIN_EXE_pmacs, and on a missing binary it eprintln!s a skip and returns ok. A fresh worktree running cargo test --features crdt --test vterm_stage3_acceptance reports 9/9 in 0.17 s having never run it; a real run takes ~4 s. Only PMACS_REQUIRE_GPU=1 promotes that skip to a failure, and CLAUDE.md applies that flag to cargo test -p pmacs-gpu — a different package, so the required local gate does not cover a37 either. The gpu-render job already sets the flag, which is what makes fix-shape part 2 sound; state it as a requirement of that job rather than inheriting it by luck, because a crdt leg added to the plain test job would run a37 vacuously.

  • a37 is also load-sensitive, which changes how to read the expected first-run failures. It passed at d152120 and failed at that same commit twenty minutes later, with a second agent saturating the machine with rustc in between; it then failed identically on d152120, 04c5ad1, and the #173 merge commit, which is how #173 established the failure was not its own. The signature is last_frame_text all spaces with rendered_nonuniform_frames nonzero — frames arrive, content does not. pmacs-gpu's own suite flaked the same way under the same load (201/202, then 202/202 on immediate rerun). So a red a37 on the first CI run is ambiguous by construction: before treating it as a real failure, run the same command on the merge base, and prefer serialized execution for this suite over retry-until-green.

  • Sort deliberate from accidental before proposing a fix. Some of the 264 are perf suites that are #[ignore]d by default and belong to their own jobs (m10_2_perf 6, m10_11_perf 1). m10_10_perf has no #[ignore] and no CI job naming it, so it looks accidental. This classification is not finished and is the lane's first task.

  • Fix shape, two parts (the flag combination is verified to work: --no-default-features --features luajit,crdt lists 10 vterm Stage 1 tests versus 9 without):

    1. a crdt leg on the test job for the non-GPU suites and the library;
    2. the GPU-requiring crdt suites onto the existing gpu-render job, which already has lavapipe and PMACS_REQUIRE_GPU=1 — vterm_stage3_acceptance, gpu_invocation_acceptance, gpu_initial_target_acceptance, gpu_font_acceptance.

  • Expect first-run failures, and budget for them. These would execute in CI for the first time ever: real PTY timing on CI runners, wgpu under lavapipe, and daemon-socket tests at unfamiliar concurrency. Start ubuntu-only and decide about macOS from evidence. A red first run is the lane working, not the lane failing.

  • Mitigating fact, verified rather than assumed: #166's three unit pins are not crdt-gated and do run under CI's exact flags, including the controller-release pin whose only job is catching the plausible wrong fix.

  • This lane also owns a --lib --features crdt flake, observed and scoped without overclaiming its cause (inherited from #178's gating, where the terminal lane recorded it). cargo test --lib --features crdt failed ~1 run in 5 on process::tests::setsid_escapee_is_not_reaped_and_teardown_reclaims_readers — active_reader_probe returning None at process.rs:3179 ("live runtime probe"). Pre-existing and unrelated to #178: that branch did not touch src/process.rs at all, and the test passed 10/10 standalone; the observed failures were during parallel full-suite runs. That localizes the trigger to suite load or interaction, but does not distinguish parallelism from another full-suite effect — no serial full-suite bite was run. The leading code-path explanation is the known drain_until trap: draining for Started also ticks, and a tick can reap the leader before the following active_reader_probe. That is an inference from the failure site and control flow, not yet a falsified root cause. Discriminating it belongs here. Two unnamed CRDT failures in #178's round-2 gating are a plausible match but remain unattributed — no test names were captured.

  • A second standing obstacle for this lane: cargo clippy --workspace --all-targets --features crdt -- -D warnings fails on main — measured at 74301d1: seven errors before the build aborts, four in src/daemon.rs (useless_conversion at 3996, missing doc backticks at 4076, too_many_lines 112/100 at 4083, an unneeded mut at 4965) and three in tests/vterm_stage3_acceptance.rs (too_many_lines at 637 and 793, a redundant continue at 843). Treat that as a lower bound, not an inventory: Clippy abandons the remaining targets once one fails, and a run on an older tree surfaced a further doc-backticks error in tests/auto_indent_crdt_acceptance.rs:42 that this run never reached. The standing gate list runs Clippy without crdt, so these lints have never been enforced. Any CI job that compiles the crdt targets has to fix them first or it will be red on arrival.

Journey lane (P1) — STAGE 1a MERGED; STAGE 1b-1 FRAMING OPEN, revision 2

  • Branch journey-stage1b1-compile-defaults, worktree ../pmacs-journey-1b1, based on githubsucks/main @ 22df6ab. Framing only; no code, no PR yet. docs/journey-stage1b1-compile-defaults-framing.md revision 2, one review round closed (two blocking, two major, all accepted).

  • Round 1's blocking finding is the Stage 1a lesson repeating. Sharing one cwd resolver between the prompt and the run is not enough: pmacs.minibuffer.read is async, the active window can change while the prompt is open, and run re-resolved at accept time — so the prompt could offer cargo build for A and execute in B. The interactive command now captures context() and passes its cwd through to run, which is commit_to's discipline on a smaller seam. The second blocker was that no pin crossed the accept boundary at all, so that defect passed every proposed pin.

  • Why this lane exists. COHERENCE.md §20 Priority 1 names Journey Stage 1b as the golden journey's remainder — "the compile binding + Cargo defaults, LSP spawn guidance, and the welcome buffer" — and it had no branch, no framing, and no lane. It is the only §20 priority with nothing in flight.

  • What 1b-1 is. Journey step 9 only: a global C-c c for compile.run, and a first prompt prefilled from the detected project kind instead of empty. Lua, tests, and docs; no Rust change and no protocol change. 1b-2 (LSP spawn guidance, step 6) and 1b-3 (welcome buffer, step 4) are separate stages — see the framing §7 for why the three are not one PR.

  • ProjectKind::Cargo does not exist. COHERENCE.md names it twice (§2's step-9 row and §20 Priority 1); the variant is ProjectKind::Rust (src/project.rs:78) and line 77 is its doc comment. The audit read the comment. Lua matches on the tag string "rust" that pmacs.project.detect returns, so no Rust primitive is needed. The PR corrects both COHERENCE sites.

  • The suggestion and the run must share one cwd resolution. Today the cwd is computed inside pmacs.compile.run (builtin/runtime/compile.lua:765), after the prompt has closed, so a suggestion computed in the command's fn would obey a different rule than the run. The stage extracts it and exposes pmacs.compile.context(), consumed by both.

  • The trap the acceptance is designed around. The last-resort cwd is std::env::current_dir() evaluated at call time (pmacs-protocol/src/message.rs:1703-1706), so in tests it is the test runner's cwd — the pmacs repo root, itself a Cargo project. compile_mode_acceptance.rs:1721 already pins this. A pin asserting "no Cargo suggestion" that reaches the fallback would report pmacs's own Cargo.toml. Negative pins therefore use a fixture carrying a different marker so the fallback is never consulted; set_search_boundary does not help here, because it only clamps a walk that starts below the boundary.

  • Known limitation, deliberately not fixed. After pmacs <dir> the active buffer is dired's and pathless (pmacs.buffer.create never assigns a path; dired compensates through its own module-local handle_for_buffer, dired.lua:205-217), so the cwd falls through to the process cwd. Launched from elsewhere that is the wrong directory. The fix is COHERENCE.md §8 (First-Class Execution Locations), a model gap; reaching into dired's private table for one string would add an interaction island.

  • Recovery from a clean checkout — the two-argument form does not work (git worktree add <path> <remote-only-branch> fails with fatal: invalid reference, because after a bare fetch no local branch exists):

    git fetch githubsucks
git worktree add ../pmacs-journey-1b1 \
  -b journey-stage1b1-compile-defaults \
  githubsucks/journey-stage1b1-compile-defaults

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.

Bottom-panel lane (Arc 7) — STAGE 2 COMPLETE; STAGE 3 IS THE LAST STEP

Stage 1, the Stage 2 framing, and Stages 2A, 2B-1, 2B-2 and 2B-3 are all on main @ 4cd4a7b (#155, #175, #177, #184, #187, #198). Stage 2 is complete. Durable facts are in docs/agent-handoff.md §1, including the v20-baseline / v21-negotiated handshake that Stage 2B-3 made compatible.

  • Stage 3 — the adopter default flip — is the arc's last step and is not started. This lane stays until it lands; it is not removed at 2B-3's merge.
  • DAP waits for Stage 2, not Stage 1 — that dependency is now satisfied.

Test ambient-root isolation — FRAMING OPEN, revision 4

  • Branch test-ambient-config-isolation, worktree ../pmacs-test-isolation, based on githubsucks/main @ 4cd4a7b. Framing only; no code, no PR yet. docs/test-ambient-config-isolation-framing.md revision 4, three review rounds closed (eight blocking, six major, all accepted).

  • What it is. Integration tests use the developer's real ambient roots. #[cfg(not(test))] guards config loading against the crate's own unit tests only, so the 65 files in tests/ that construct an editor load the real init.lua — and, separately, EditorState::new materializes bundled packages unconditionally into the real XDG_DATA_HOME/$HOME. It is not read-only: ~/.local/share/pmacs/builtin-packages/ exists on the development machine.

  • Why it matters now. cargo test is red on any machine with a real ~/.config/pmacs/init.lua (11 of 67 in compile_mode_acceptance) and green in CI, so the failure is attributed to whatever branch is checked out. Every local gate run in this repo currently needs all five bootstrap-storage variables controlled as a workaround: XDG_CONFIG_HOME, XDG_DATA_HOME, XDG_STATE_HOME, XDG_CACHE_HOME, and PMACS_STATE_HOME.

  • Round 1's four blocking findings, all confirmed in code: the read-only assumption was already false; the population count was 18 when 65 of 96 files construct an editor, from a grep that did not match EditorState::new; 5 files are both in-process and spawned, so a file-level partition cannot work; and EditorState::open calls Self::new() while journey_acceptance requires that exact entry point.

  • Two constraints any fix must respect. std::env::set_var is unsafe and the crate forbids it, so in-process tests cannot isolate themselves (precedent: Installer::root_override). And config loading shares one block with set_init_complete(), which m8_2_acceptance.rs:75 explicitly depends on — skipping the block would leave integration tests permanently in the init phase.

  • Recovery from a clean checkout — the two-argument form does not work, verified by running it (git worktree add <path> <remote-only-branch> fails with fatal: invalid reference, because after a bare fetch no local branch exists):

    git fetch githubsucks
git worktree add ../pmacs-test-isolation \
  -b test-ambient-config-isolation \
  githubsucks/test-ambient-config-isolation

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.