# Active work — cross-machine resume ledger **Snapshot: 2026-07-25.** 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. ## 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` @ `0dd16a5` (GPU initial-target #148 atop folding Stage 2 landed-doc refresh #150, folding Stage 2 #149, the ledger refresh #147, web grammars HTML+CSS #146, and the LaTeX Stage 1 #144 / inline-math framing #145 pair; protocol v20). - 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: ```sh 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: ```sh git remote add githubsucks https://github.com/levineuwirth/pmacs.git ``` Then recover current refs: ```sh git fetch githubsucks --prune git log -1 --oneline githubsucks/main git worktree list git status --short --branch ``` The `git log` command must expose `0dd16a5` or a newer intentional main. If it does not, stop and repair the remote/fetch configuration. ## Lean 4 lane (Arc 8) — Stage 1 MERGED; Stage 2 IN REVIEW (PR #161) - Stage 1 **merged as #160** (`main` @ `0827dd1`, 2026-07-25, one review round, all twelve checks green). Branch `githubsucks/lean4-stage1` retained; it was worked in the shared checkout (no sibling worktree). - Approved framing: `docs/lean4-mode-framing.md` revision 4, committed as the branch's first commit (`a382965`) after three review rounds. **Seven stages**, 19 decisions (Q#LN1–19), 64 acceptance criteria. North star: match or exceed VS Code's Lean support. - **Stage 1 implemented; no wire change (protocol stays v20), no LSP, no frontend change.** Four commits: framing, grammar, theme captures, editing surface + acceptance. - `Cargo.toml` + `src/syntax.rs`: `arborium-lean` 2.18 and one `BUILTIN_LANGUAGES` entry named **`lean4`** (Q#LN2 — the name becomes the `didOpen` language_id), claiming `.lean` only. - `src/highlight.rs`: four capture entries — `constructor`, `character`, `keyword.conditional`, `warning`. - `builtin/runtime/{comment,pair,syntax}.lua`: `--` comments, the `⟨⟩ ⦃⦄ ⟮⟯` pair set, the `lean` → `lean4` modeline alias. - `tests/lean4_stage1_acceptance.rs` plus unit tests in `syntax.rs` / `highlight.rs`: 12 criteria, 17 tests. - **Q#LN1's open obligation is discharged.** `tree-sitter-lean4` is unusable (depends on `tree-sitter ^0.25` directly against our 0.26, exports no `LANGUAGE` const despite its README, packages no queries); `arborium-lean` rides `tree-sitter-language 0.1` with a pre-generated ABI-15 parser. `cargo tree -d` shows no duplicate core. The parse smoke pins the failure mode that matters: `→`/`∀`/`≥` must produce `(arrow)`/`(forall)`/`(comparison)`, since a mismatched-core build degrades silently on exactly those characters rather than failing loudly. - **Q#LN4 is a deliberate retro-paint of seven language entries**, not four: `tree_sitter_javascript::HIGHLIGHT_QUERY` is concatenated base-first into javascriptreact/typescript/typescriptreact. Its shape is "every capitalized identifier" (`#match? "^[A-Z]"`) plus every Lua table brace — not "constructors". Pinned in both directions per #146. - Implementation findings not in the framing: - `warning` had to move from bold red to bold **bright** red: `number` is plain `fg(1)`, so `sorry` and an adjacent numeric literal were the same colour. Found by writing the test. - `Some(1)` is **not** `@constructor` — in call position a narrower `@function` pattern wins. Only bare or pattern-position capitalized identifiers reach it. Pinned so the blast-radius claim stays honest. - Lean node kinds nest: `module > declaration > def|theorem`. - `pmacs.parse.injection_aliases` is a documented **write-only** Lua proxy (canonical map is Rust-side), so fence tests must drive `_parse_now` and inspect layer languages, never read the table back. - **Review round 1 addressed.** The finding: acc12's server-list assertion could not fail for the regression it named — the shared `editor()` helper wipes `pmacs.lsp.config` before any buffer opens, so `#pmacs.lsp.list() == 0` holds for every language regardless of what Stage 1 ships. It now asserts against a **pristine** `EditorState` that `pmacs.lsp.config.lean4` is nil, with a non-vacuity check that the same lookup finds `rust`; bite-verified by adding a `lean4` config to `lsp.lua` and watching it fail. Also fixed a stale column in a `highlight.rs` comment. - Verification on this branch: `cargo fmt --check` clean; strict workspace Clippy clean; 1,826 default + 2,003 CRDT library tests; lean4 Stage 1 9/9; comment toggle 14; auto-pair 45; injection 4; M4 121; required GPU 152; **isolated-config workspace sweep 3,150 across 90 suites**; `git diff --check` clean. The sweep needs an isolated `XDG_CONFIG_HOME` for the reason recorded in the bottom-panel lane below. ### Stage 2 — multi-root LSP server affinity (Q#LN15) - Portable branch: `githubsucks/lsp-multi-root-affinity`, shared checkout, based on `githubsucks/main` @ `0827dd1`. Named for the substrate, not for Lean: **the diff contains no Lean content**, because `ensure_server` is the one server-affinity function every LSP language shares and a cross-cutting change to it must not be reviewable only as a Lean feature. - Three files, no protocol change: `src/lua_bindings/mod.rs` (the `lsp.list()` row builder gains `root_uri` + `cwd`), `builtin/runtime/lsp.lua` (`project_root_for` returns `root, source`; `ensure_server` hoists it above the reuse loop and matches on it), `tests/lsp_multi_root_acceptance.rs` (9 tests, acceptance 13–21). - **The rule that keeps this from regressing every other language: the affinity key is the root only when a root was actually FOUND.** `project_root_for` never returns nil for a file with a path — its last resort is the file's own directory — so a naive `(language_id, root)` key gives every directory of loose scratch files its own server, for every language. `source` is `"config" | "detected" | "fallback"` and only the first two become a key. - **Wire-identical for the fallback case, and that is provable rather than hoped.** Matching is on the spawned spec's `root_uri` (nil matching nil), so the fallback spawn passes `root_uri = nil`; `cwd` still carries the directory and `build_initialize` derives the identical `rootUri` from `cwd` when the field is None, using a percent-encoder with the same allowed set as Lua's `file_uri_for`. `build_initialize` (`src/lsp.rs`) is the **only** reader of `spec.root_uri` in the tree. - Deliberate behavior change, asserted not discovered: a server hand-spawned from `init.lua` with only `cwd` set also reads back nil, so a root-bearing attach will not adopt it. - `config[language].root` may now be a `function(path) -> string|nil`, memoized per directory — needed because the hoist puts root resolution on every attach rather than every spawn. The memo is keyed **weakly by the resolver function itself**, so replacing `config[lang].root` cannot serve a root the previous resolver computed. This is Q#LN8's generalization landing early; the Lean resolver that uses it is Stage 3. - Bite-verified three ways: 5/9 fail against the pre-change `lsp.lua`, 8/9 against the pre-change `mod.rs`, and — the one that matters most — installing the naive always-key-on-root variant fails acceptance 20 and 21 exactly as Q#LN15 part 2 predicts. The four that survive the first bite (13, 15, 16, 19) are the regression pins; passing on both sides is their job. - Every fixture sets `pmacs.project.set_search_boundary` at its own tempdir root. Without it the marker walk climbs to the filesystem root and a stray `.git` above the temp directory turns the markerless cases into detected ones — the assertions would still pass while testing nothing. - **Found but not fixed here (pre-existing, own lane):** `ensure_server` never forwards `cfg.restart` to `pmacs.lsp.spawn`, so a `restart = "never"` in `pmacs.lsp.config[lang]` is silently dropped on the auto-attach path. At least one existing test sets it believing it takes effect. Out of scope for a PR whose acceptance 16 pins existing attach behavior as unchanged. - **Review round 1 addressed.** The blocker was process, not design: the test file was committed *before* `cargo fmt` ran, so the fix sat uncommitted in the working tree and the branch as pushed failed the first gate. The reported "fmt clean" described the worktree, not the branch — gate results are only meaningful when run against the pushed tree. Also added the two pins review asked for (a **string** `config .root` as an affinity key — acc17 only covered the function form; and `root = false` reading as unset), each bite-verified against exactly the mutation it targets and neither against the other. And documented the canonicalization obligation: the `"detected"` arm is canonicalized for free, a **configured** root is not, so on macOS a resolver returning `/var/…` and a detected `/private/var/…` are different keys for one directory. Stage 3's Lean resolver is the first real consumer, so the obligation is written at the point of use. - Verification on this branch: `cargo fmt --check` clean; strict workspace Clippy clean; 1,826 default + 2,003 CRDT library tests; multi-root 11/11; M4 121; statusline 7; completion popup 9; auto-pair 45; required GPU 155; **isolated-config workspace sweep 3,164 across 91 suites**; `git diff --check` clean. The sweep needs an isolated `XDG_CONFIG_HOME` and `-- --skip basedpyright`. ## Dired lane — framing APPROVED; Stage 0 MERGED, Stage 1 next - Approved framing: `docs/dired-framing.md` (revision 5), landing as its own docs PR off `githubsucks/main` @ `2af1ab3`, branch `githubsucks/dired-framing`, worktree `../pmacs-dired-framing`. The repo's `-framing`-branch convention (`vterm-framing`, `gpu-initial-target-framing`, `tab-width-parity-framing`). - **Stage 0 (`C-x C-f` find-file) MERGED as #162** (`main` @ `2af1ab3`, 2026-07-25, one review round, 12/12 CI green). Durable facts moved to `docs/agent-handoff.md` §1 per rule 3 below. - **Stage 1 (the dired view) is next and unstarted.** Branch `dired` (worktree `../pmacs-dired-arc`) carries the framing commits only and is based on the now-superseded `0827dd1`; **rebase it onto the `main` resulting from the framing PR before implementing**, or cut a fresh branch — its framing commits become redundant once the docs PR lands. - Stage 1's scope, from the framing §10: `builtin/runtime/dired.lua`; the `dired` major mode + mode keymap; buffer-per-directory with lexical canonicalization and the ownership check; read-only intercept + `set_round_trip_input`; visit routing through `window.display_file`; parent/sort/revert/quit; `C-x d` (with the `display` opt) / `C-x C-j`; cursor preservation by basename; the `dired.kill-when-opening` config key; **and the tolerant `read_dir` opt** — the only Rust in the stage. - The one Rust change is load-bearing and is why Stage 1 is not pure-Lua: `read_dir_blocking` (`src/fs.rs:201`) fails the **entire listing** on any of five per-entry conditions, and the tolerant wrapper its own module doc delegates to package authors **cannot be written in Lua** — the primitive returns one error and no partial vec. - Coherence (framing §0.5, required since #163): serves `COHERENCE.md` §20 Priority 1, which names this work explicitly; journey steps 7 and (partially) 3; **adds no interaction island** — keys are a mode-scoped keymap, and wdired is a mode swap; adopts `pmacs.config` for `dired.kill-when-opening`; inherits §9's worker-attribution gap for its `read_dir` jobs without worsening it. - **Boundary with the Journey Stage 1 arc** (`COHERENCE.md` §20 arc-cut 1): CLI directory-argument handling (`pmacs .` exits 1) belongs there, not here. The two meet at `resolve_target_buffer`; dired supplies the buffer a directory should resolve *to*, and `pmacs .` should route into it rather than growing a second directory surface. ## 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`: 3,024 vs 3,288 — 264 tests dark.** Per target: | dark | CI | full | target | |---:|---:|---:|---| | 177 | 1,832 | 2,009 | **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 | 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 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. 177 library tests — the whole CRDT half — are developer-machine-only. - **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". - **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. ## Bottom-panel lane (window placement + side windows) — Stage 1 IN REVIEW - Portable branch: `githubsucks/bottom-panel`, worktree `../pmacs-bottom-panel`, based on `githubsucks/main` @ `ddaa80d`. - Approved framing: `docs/bottom-panel-framing.md` revision 4, committed as the branch's first commit (`c27f75a`). - **Stage 1 implemented; no wire change (protocol stays v20).** What landed on the branch: - `src/window.rs`: `WindowParams` (`side` / `fixed_rows` / `dedicated` + implementation-owned `quit_action` and `origin_document`), `Side`, a depth-bounded `QuitAction`, `MIN_WINDOW_OUTER_ROWS = 2`, `Layout::compute(area, fixed)`, the `subtree_min_rows` / `interactive_min_rows` recursions, `boundary_below`, and the three new `FrontendView` fields (`panel_capable`, `frame_geometry`, `panel_hidden`). - `src/editor_core.rs`: `primary_document_window`, the non-side target rule, `display_buffer` + the Q#BP3 placement policy, `quit_window`, `reconcile_panel_layout_core`, `resize_boundary`, per-frontend `JumpEntry`s, and the shared `resolve_target_buffer` seam that the #148 initial-target bootstrap now routes through as well. - `src/editor.rs`: the reconciliation transaction, geometry declaration, the side-window `dispatch_idle_for` gate, the divider paint, and the divider drag. - `src/lua_bindings/window_panel.rs`: the whole `pmacs.window` panel surface plus the shared adopter-placement helpers; `builtin/runtime/window.lua` owns `window.panel-height` / `window.min-height` and the resize commands. - Adopters: `listview.open`, `compile.run`, `pmacs.terminal.open` all take `display = "current" | "panel"` (Stage 1 default `"current"`); LSP/compile visits route through `display_file`. - **Review round 1 addressed.** The load-bearing finding: the Q#BP6 side-window split guard (`try_split_active`) had **no production caller** — `pmacs.window.split_horizontal` / `split_vertical`, and so `C-x 2` / `C-x 3`, still went through plain `split_active`. Splitting a focused panel made the root wrapper's final child a split rather than `Leaf(side)`, which both `Layout::compute`'s fixed pass and `document_subtree` key on. It survived the first round because the acceptance test called the core method **directly**; it now goes through the real Lua binding. This is the folding-arc round-2 lesson repeating exactly: *after wiring a guard into a production hook, pin it through the real path — a direct-call test misses the wiring.* Also fixed: the armed divider drag was not scoped to its arming frontend (it could cancel and swallow a peer's mouse events); a recompile carries no `display` and duplicated a panel-placed `*compilation*` into the document window; and `paint_mode_line_graphemes` had lost its doc block to an insertion. Five bite-verified fixes (three via `scripts/bite`, two by manual revert since their tests share `src/daemon.rs` with the production code). - Two Stage-2 hazard pins now exist in `src/daemon.rs`, closing the gap the review named: a fresh attach while `LOCAL` is focused in a panel inherits `LOCAL`'s **document** buffer, and an initial-target bootstrap whose `after-load` hook creates and selects a panel still reasserts into a document window. - **Review round 2 addressed.** The load-bearing finding: **Q#BP7 item 1 — "growth reaching the live tail re-arms follow" — was never implemented.** `at_bottom` is the instantaneous geometric readout `scroll_offset == 0`, which a still-anchored view satisfies whenever it is momentarily tall enough to reach the tail, so the round-1 assertion could not see the gap: the next rows the child printed pushed the anchored view back into history. `src/terminal/view.rs` now has `rearm_follow_on_growth`, reached by one shared `declare_view_size` helper from every size-declaring path (`snapshot_for_view`, `record_view_size`, `view_status_for_size`) so grid and semantic declarations cannot disagree. Also fixed: the PTY fixtures emitted LF-only output, which staircases until every row clips to blanks — so the anchor assertions compared `""` with `""` and could not fail (now CRLF, each guarded by `assert!(!top_before.is_empty())`); acc33's contrast case asserted nothing; `start_run` let `already_in_panel` override an **explicit** `display = "current"`, which is the documented opt-out from the Stage 3 flip (now gated on omission); and `window_drag` was a daemon-global slot that a peer's mode-line press could clear. - Durable test lessons from this round, both the same class: 1. **A geometric readout is not a state predicate.** `at_bottom` says "the viewport currently reaches the tail", not "this view follows the tail". Pinning follow requires feeding MORE output and asserting the view moved (acc32b uses a filesystem gate between two bursts). 2. **A PTY in the default mode does not translate LF to CRLF.** An `echo`-driven fixture staircases rightward and clips to blanks past the viewport width, so any text equality over it is vacuously true. Emit `\r\n`, and guard text comparisons with a non-empty assertion the way the daemon pin guards on `!panel_hidden`. - **Round-2 self-review caught a regression the round-2 commit introduced**, in the change it labelled "minor": routing `pmacs.window.buffer()`'s **no-argument** arm through the fid-scoped `selected_window` validator made it **fallible**, and `acting_frontend` can name a frontend with **no registered view** (a bare `dispatch_key` from an unattached peer does exactly that). The runtime calls that function on ordinary edits from `killring`, `syntax`, `autosave`, `pair`, `indent` and `comment` **without `pcall`**, so the raise never surfaced as an error — it silently dropped the operation. `kill_ring_acceptance` went 30/30 → 25/5 (`frontend_detached_drops_per_frontend_state`: "B has kill state"). The no-arg arm is back on ambient `active_buffer_id()` and documented as deliberately infallible; the explicit-window arm keeps its Q#BP11 validation. New **acc19c** pins it through the real path (a `buffer.after-edit` subscriber during a viewless peer's `dispatch_key`) and bites against the regressing commit. Generalizes: **a "uniformity" cleanup that changes a function's fallibility is not minor** — check every caller's error discipline first, and remember that an ambient resolver's fallback IS its contract. - Verification on this branch: `cargo fmt --check` clean; strict workspace Clippy clean; 1,817 default + 1,994 CRDT library tests; `bottom_panel_stage1_acceptance` 46/46; kill ring 30 default + 30 CRDT; vterm Stage 1 9 default + 10 CRDT; M4 121; required GPU 152; compile 67; vterm Stage 2 4 / Stage 3 5 (7 CRDT); folding Stage 2 48; statusline 7; listview 6; **isolated-config workspace sweep 3,130 passed across 89 suites, zero failures**; `git diff --check` clean. - **Run the sweep with an isolated `XDG_CONFIG_HOME`.** The real `~/.config/pmacs/init.lua` on this desktop calls `pmacs.packages.install_local(...)`, so every editor the sweep builds races on one shared install root; a losing race sets a status message that leaks into the mode line and breaks `folding_stage2_acceptance::unfolded_frame_is_identical_to_the_pre_folding_baseline`, which compares whole painted frames. Standalone it is 48/48. This generalizes the known `compile_mode_acceptance` real-config trap: any suite that paints the status area inherits it. - **A latent pre-existing `main` bug surfaced while gating and is NOT this branch's**: `buffer::tests::proptests::rope_matches_crdt_projection_after_arbitrary_edits` fails on `main` @ `352bf0b` with `ops = [Insert(0,"a"), Insert(0,"aaa"), Replace(0,1,"a"), Undo]` — undo of a textually-null `Replace` returns a no-op edit result still carrying `crdt_op = Some`, violating the suite's own shape invariant. `src/buffer.rs` is byte-identical here, and the seed was deliberately **not** committed (it would make an unrelated failure deterministically red on this PR). Needs its own lane. - Durable test lesson from this round: `TerminalViewStatus.scroll_offset` is documented as the retained rows between **this viewport** and the live tail, so it necessarily tracks the viewport height. Asserting it constant across a panel height change is either vacuous or wrong — the invariant Q#BP7 actually states is that the **anchor** is frozen, which the acceptance now pins by comparing the first visible row's text, plus `at_bottom` for the follow re-arm. - `compile_mode_acceptance` needs `--test-threads=1` locally; it is 67/67 there. Under default parallelism it fails roughly 1 run in 3, with a *different* test each time (acc14/acc25a, then acc24) — **verified pre-existing** by swapping in `githubsucks/main`'s `builtin/runtime/compile.lua` and reproducing the same rate. The `pmacs-gpu` bin tests have historically gone red under a loaded sweep (wgpu device contention). Rerun isolated before treating either as a regression. - Stage 2 (the GPU panel band, next available protocol version) has its own re-framing obligation before implementation; Stage 3 is the default placement flip. ## 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: ```sh git worktree add --track \ -b kill-ring-browser \ ../pmacs-kill-ring-browser \ githubsucks/kill-ring-browser ``` ## Documentation lane - Portable branch: `githubsucks/handoff-2026-07-20` - Carries synchronized `AGENTS.md` / `CLAUDE.md`, this ledger, the durable handoff refresh, and the keybinding reference correction. - It changes no runtime code. - Review and merge this documentation branch separately; it must not be folded into a feature framing branch. - Now also absorbs both landed arcs: Vterm Stage 1 (#126) and the config registry (#127). Canonical `main` is merged into it up to `2e37c04`, so its diff against `main` is documentation only. ## Closed since the last snapshot - **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. - **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 `