Merge pull request #164 from levineuwirth/dired-framing

docs: dired arc framing (revision 5) + post-merge doc refresh

docs/active-work.md

@@ -1,6 +1,6 @@
 # Active work — cross-machine resume ledger
 
-**Snapshot: 2026-07-24.** This file records volatile work that has not
+**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.
@@ -124,6 +124,45 @@ If it does not, stop and repair the remote/fetch configuration.
   or markerless scratch files fragment into one server per directory for
   every language.
 
+## 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+  based on the now-superseded `0827dd1`; **rebase it onto the `main`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.
+
 ## Bottom-panel lane (window placement + side windows) — Stage 1 IN REVIEW
 
 - Portable branch: `githubsucks/bottom-panel`, worktree

docs/agent-handoff.md

@@ -1,7 +1,12 @@
 # Agent handoff — cross-machine continuity
 
-**Last updated: 2026-07-24, after GPU initial-target (#148, protocol v20)
+**Last updated: 2026-07-25, after find-file (#162) landed — the dired
-landed, following folding Stage 2 (#149) and its landed-doc refresh (#150),
+arc's Stage 0 — following COHERENCE.md (#163), Lean 4 Stage 1 (#160), the
+minimap blank-slab fix (#159), bottom-panel Stage 1 (#155), the
+inline-math re-scout (#154), the vterm PTY-flake fix (#153), and the
+GPU initial-target doc refresh (#152); and before that GPU
+initial-target (#148, protocol v20),
+following folding Stage 2 (#149) and its landed-doc refresh (#150),
 web grammars HTML+CSS (#146), the LaTeX Stage 1 / inline-math framing pair
 (#144/#145), folding Stage 1 (#142), one-command GPU invocation (#141), the
 documentation refresh (#140), Vterm Stage 3 (#135), tab-width rendering
@@ -19,9 +24,55 @@ reads it the way you just did.
 For volatile branches, checkpoints, verification, and recovery
 commands, read `docs/active-work.md` immediately after this file.
 
-## 1. Where the project stands (2026-07-24)
+## 1. Where the project stands (2026-07-25)
 
-- `main` @ `0dd16a5` (GPU initial-target #148 atop folding Stage 2 landed-doc
+- `main` @ `2af1ab3` (find-file #162 atop COHERENCE.md #163, Lean 4 Stage 1
+  #160, minimap blank-slab #159, bottom-panel Stage 1 #155, inline-math
+  re-scout #154, vterm PTY-flake #153, and doc refresh #152). Protocol
+  unchanged at **v20**. The bullets below describe the arcs in their own
+  terms; this line is the head-of-`main` anchor.
+- **`COHERENCE.md` is now required reading and a required framing input
+  — #163.** It carries the product-coherence thesis, an audited
+  scorecard, per-concern gaps, and §20's priority order, and it is the
+  standard new work is evaluated against. Per `CLAUDE.md`, **every new
+  framing doc must state its coherence impact** — journey steps touched,
+  interaction islands added, config-registry adoption, background-work
+  attribution. Its §2 grades the golden journey **broken at step 3**
+  (`pmacs .` exits 1).
+- **find-file LANDED — #162** (`docs/dired-framing.md` §10, Q#DR11; merge
+  `2af1ab3`; one review round). `C-x C-f` is the dired arc's **Stage 0**:
+  pmacs previously had no discoverable way to open a file by path — no
+  such command existed and `pmacs.buffer.find_or_open` had no interactive
+  caller. Pure Lua in `builtin/commands/default.lua`, one keymap line, an
+  8-test dispatch-driven acceptance suite; no Rust, no protocol change.
+  Two substrate facts it documents, both worth knowing before touching
+  any minibuffer prompt:
+  - **Completion over files is flat and cannot be made hierarchical from
+    Lua.** A custom `source` function is called with **zero arguments**
+    (`minibuffer.rs:591`) and runs synchronously outside any coroutine,
+    where `Handle:await()` raises — so it can neither see the input to
+    re-root on nor list a directory. Only the Rust
+    `CompletionSource::Files { root }` can list, and it is
+    single-directory and 1024-capped.
+  - **A selected candidate SHADOWS typed text.** `recompute_candidates`
+    sets `selected = Some(0)` whenever the list is non-empty
+    (`minibuffer.rs:372-377`) and `resolve_accepted_value` returns the
+    candidate over the typed contents (`:564-574`). So free-text accept
+    fires only when the input filters every candidate away — for
+    basename candidates under a subsequence filter, when it contains a
+    `/`. This applies to `M-x` and `switch-buffer` too. Consequences are
+    pinned as decisions, including the hole where a new bare name that is
+    a subsequence of an existing entry opens the existing file, and the
+    empty-input case (`fuzzy_score` gives `Some(0)` for an empty needle
+    and ties break lexicographically, so dotfiles lead).
+  - Also: `get_or_load_buffer` computes a normalized path but **loads
+    from the raw one** (`editor_core.rs:842-856`), so a `~/…` path dedups
+    against an open buffer yet fails to load one that is not open —
+    find-file expands the tilde Lua-side. Loading through the normalized
+    path is a named deferral.
+- **GPU initial target LANDED — #148**
+  (`docs/gpu-initial-target-framing.md` rev 3; merge `0dd16a5`; two review
+  rounds). `pmacs --gpu [--socket NAME|PATH] FILE` transports exact Unix path
   refresh #150, folding Stage 2 #149, ledger refresh #147, web grammars #146,
   LaTeX Stage 1 #144 / inline-math framing #145, and folding Stage 1 #142),
   protocol **v20** (`SUPPORTED=[6..=20]`; v16 = `ThemeFacts`, v17 =