# GPU probe SIGINT lane — run manifest

Every physical run behind
`docs/gpu-probe-sigint-framing.md` §4. Pushed so the evidence travels;
the log bodies stay machine-local under
`/home/jeans/build/pmacs-gate-targets/probe-sigint-evidence/` and are
identified here by SHA-256 prefix and byte count.

## Provenance honesty

These runs were made **before** this manifest existed, so their
provenance is **reconstructed, not captured**. Specifically:

- **Commands** are exact and complete argv. Revision 3 abbreviated
  R7–R9 as "`--test` ×N (targets 6–37)" and F5 as "`--acceptance` ×6",
  which are descriptions, not reconstructable invocations. They are
  written out in full below.
- **Worktree** is exact.
- **HEAD** is given as a range where the run cannot be pinned to one
  commit, and marked `~`. It is never guessed at single-commit
  precision.
- **Cleanliness** was not recorded at the time and is therefore
  `UNKNOWN` for every pre-manifest run. It is not inferred.

**D0 (below) exists because of this.** No conclusion in §4 should rest
on a `UNKNOWN`-cleanliness row once D0 has replaced it.

## Artifact identity — suffix is NOT byte identity

Two distinct things were conflated in revision 3 and are separated here.

**Cargo suffix** is recorded in each log and is therefore *known* per
run. **Byte identity** is not: target directories have been overwritten
many times since, so a hash computed today is the hash of whatever
occupies that path now, not of what a given run executed.

That the two differ is demonstrated, not assumed. F1 ran in the `main`
worktree (`pmacs-fdccc423`) and executed suffixes `-5d9105cb7047aab8`
and `-d4dae4f01bcdef62` — **the same suffixes** as the panel-worktree
sweeps — yet the bytes at those paths differ by worktree:

| worktree | `gpu_initial_target…-5d9105cb` | `gpu_invocation…-d4dae4f0` |
|---|---|---|
| `pmacs-fdccc423` (main) | `e057803988c34cf7` | `00f06aeb089ce38d` |
| `pmacs-mapping-gen-…` (§5b) | `1b3cc86cbb8d6092` | `ede0c07dd9abb456` |

Same suffix, different source head, different bytes **today**. So
**"workspace artifact family" was not an identity class** and is
withdrawn as a grouping.

Three levels of knowledge, kept apart:

1. **Suffix — known**, from each log. A differing suffix means Cargo
   computed a different metadata hash, i.e. it treated the two as
   distinct compilations.
2. **Today's bytes at a path — known**, and shown above.
3. **The bytes a historical run executed — UNKNOWN.** Target
   directories have been overwritten repeatedly since; a hash computed
   now is the hash of the current occupant.

So statements of the form "R9 and the sweeps ran byte-different
binaries" are **withdrawn everywhere**. What is established is that
they ran **different Cargo compilations** (different suffixes), which
is enough to void the comparison and is all that is claimed. R1 and R2
have no preserved log and cannot claim even a suffix.

## Runs

All in worktree `pmacs-mapping-gen` unless stated. `WT=mg` is
`/home/jeans/Repos/personal/pmacs-mapping-gen`; `WT=main` is
`/home/jeans/Repos/personal/pmacs` at `72da24a`. All carry
`CARGO_TARGET_DIR=/home/jeans/build/pmacs-gate-targets/pmacs-mapping-gen-8cb089c8`
except `WT=main`, which uses `…/pmacs-fdccc423`.

| id | exact command (after `cargo`) | WT | HEAD | clean | artifacts | result | log (sha256/16, bytes) |
|---|---|---|---|---|---|---|---|
| R1 | `test --features crdt --test gpu_invocation_acceptance ctrl_c_on_launcher_group` ×3 | mg | ~`724b785`–`5174f73` | UNKNOWN | reduction | green, 0.15–0.17 s | **none preserved** |
| R2 | `test --features crdt --test gpu_invocation_acceptance` | mg | ~`724b785`–`5174f73` | UNKNOWN | reduction | green, 15 passed | **none preserved** |
| R3 | `test --workspace --features crdt --no-fail-fast -- --skip basedpyright ctrl_c_on_launcher_group` | mg | ~`724b785`–`5174f73` | UNKNOWN | workspace | green | `e09a96512035284e` 33113 |
| R4 | `test --features crdt --lib --test gpu_invocation_acceptance --no-fail-fast` | mg | ~`724b785`–`5174f73` | UNKNOWN | reduction | green, 2145 + 15 | `89050c702de22d57` 158812 |
| R5 | `test --features crdt --no-fail-fast --test gate_script_acceptance --test gpu_invocation_acceptance` | mg | ~`5174f73`–`b72843a` | UNKNOWN | reduction | green | `31b3e5249b475479` 3706 |
| R6 | `test --features crdt --no-fail-fast --test gpu_font_acceptance --test gpu_initial_target_acceptance --test gpu_invocation_acceptance` | mg | ~`5174f73`–`b72843a` | UNKNOWN | reduction | green, 11+15+15 | `332693a39c73731a` 4569 |
| R7 | `test --features crdt --no-fail-fast --lib --bins --test acceptance --test ambient_isolation_acceptance --test auto_indent_acceptance --test auto_indent_crdt_acceptance --test auto_pair_acceptance --test auto_pair_crdt_acceptance --test autosave_acceptance --test bottom_panel_stage1_acceptance --test bottom_panel_stage2a_acceptance --test bottom_panel_stage2b_daemon_acceptance --test bottom_panel_stage2b_gpu_acceptance --test bottom_panel_stage2b_protocol_acceptance --test comment_toggle_acceptance --test compile_mode_acceptance --test gpu_invocation_acceptance` | mg | ~`b72843a` | UNKNOWN | `gpu_invocation…-6b4b8223` **only** — R7 does not select `gpu_initial_target` | green | `9e1ebc59ed9f0dd4` 187531 |
| R8 | `test --features crdt --no-fail-fast --test compile_mode_crdt_acceptance --test completion_popup_acceptance --test config_registry_acceptance --test cua_region_acceptance --test desktop_acceptance --test destination_capture_acceptance --test dired_acceptance --test discovery_acceptance --test discovery_stage2_acceptance --test editops_acceptance --test find_file_acceptance --test folding_acceptance --test folding_stage2_acceptance --test full_grid_resync_acceptance --test gate_script_acceptance --test git_status_stage1_acceptance --test gpu_font_acceptance --test gpu_initial_target_acceptance --test gpu_invocation_acceptance` | mg | ~`b72843a` | UNKNOWN | `-91f51d0b` / `-6b4b8223` per log | green | `8b26ebfcf5f871b4` 28677 |
| R9 | `test --features crdt --no-fail-fast --lib --bins --test acceptance --test ambient_isolation_acceptance --test auto_indent_acceptance --test auto_indent_crdt_acceptance --test auto_pair_acceptance --test auto_pair_crdt_acceptance --test autosave_acceptance --test bottom_panel_stage1_acceptance --test bottom_panel_stage2a_acceptance --test bottom_panel_stage2b_daemon_acceptance --test bottom_panel_stage2b_gpu_acceptance --test bottom_panel_stage2b_protocol_acceptance --test comment_toggle_acceptance --test compile_mode_acceptance --test compile_mode_crdt_acceptance --test completion_popup_acceptance --test config_registry_acceptance --test cua_region_acceptance --test desktop_acceptance --test destination_capture_acceptance --test dired_acceptance --test discovery_acceptance --test discovery_stage2_acceptance --test editops_acceptance --test find_file_acceptance --test folding_acceptance --test folding_stage2_acceptance --test full_grid_resync_acceptance --test gate_script_acceptance --test git_status_stage1_acceptance --test gpu_font_acceptance --test gpu_initial_target_acceptance --test gpu_invocation_acceptance` | mg | ~`b72843a` | UNKNOWN | **`-91f51d0b` / `-6b4b8223`** (log `:3066`) | green | `b31d98ee2f427eca` 214566 |
| R10 | `test --workspace --features crdt --no-fail-fast --test gpu_initial_target_acceptance --test gpu_invocation_acceptance -- --skip basedpyright` | mg | ~`b72843a` | UNKNOWN | **`-5d9105cb` AND `-d4dae4f0`** (log `:3`, `:4`) | green | `81b48fd7a0e261dc` 3553 |
| F1 | `build --workspace --no-default-features --features luajit,crdt && test --workspace --features crdt --no-fail-fast -- --skip basedpyright` | **main** | `72da24a` | clean (verified `git status --porcelain` empty) | `-5d9105cb` / `-d4dae4f0`; today's occupants `e0578039…` / `00f06aeb…` | **red** | `10b55b8ba8741125` 334446 |
| F2 | `test --workspace --features crdt --no-fail-fast -- --skip basedpyright` | mg | ~`b72843a` | UNKNOWN | `-5d9105cb` / `-d4dae4f0`; bytes UNKNOWN | **red** | `474f88f0dad581fe` 338555 |
| F3 | same argv as F2, with a resource sampler running | mg | ~`b72843a` | UNKNOWN | as F2; bytes UNKNOWN | **red** | `7b8519e7300e8bb3` 338555 |
| F4 | same argv as F2, with a process-table sampler running | mg | ~`b72843a` | UNKNOWN | as F2; bytes UNKNOWN | **red** | `5ccdefc5d89eece3` 338555 |
| F5 | stage 15 of `./scripts/gate --protocol --acceptance bottom_panel_stage1_acceptance --acceptance bottom_panel_stage2a_acceptance --acceptance bottom_panel_stage2b_daemon_acceptance --acceptance bottom_panel_stage2b_gpu_acceptance --acceptance bottom_panel_stage2b_protocol_acceptance --acceptance gui_stage1a_wire_acceptance` | mg | `5174f73` + uncommitted docs | UNKNOWN | suffixes per log; bytes UNKNOWN | **red** (3 bins: both ctrl_c copies + `m6_1_pty_mode_lifecycle`) | `20260817T172537Z-2375685/15-sweep-crdt.log`, sha `e5bdc911e366` |
| F6 | stage 9 of `./scripts/gate --protocol` | mg | **`724b785`** (see below) | UNKNOWN | suffixes per log | **red** (2 bins, both ctrl_c copies) | `20260816T063330Z-1977433/09-sweep-crdt.log`, sha `7a75d999ac4f` |
| F7 | stage 9 of `./scripts/gate --protocol` | mg | `5174f73` (committed 08:45:41, run began 08:45:49) | UNKNOWN | suffixes per log | **red** (2 bins, both ctrl_c copies) | `20260816T064549Z-2144707/09-sweep-crdt.log`, sha `9d3c6ad1bfc9` |

Supporting, not a reduction: `9b8a01076b44bb7c` 98838
(`proc-sample.log`) is the process-table sampler output behind the
retracted "mechanism located" claim.

**The red count is 7, not 5.** Revision 3 said "F1–F5, red 5/5" while
the framing separately cited gate `…-2144707`, a *different* physical
run the manifest never listed. Both exist, both are red, and there is a
third gate run too. F1–F7 above enumerate all seven, each with its own
log digest. F5 also has an extra failing binary
(`m6_1_pty_mode_lifecycle_started_then_exited`) that F6/F7 do not.

**R2 and R6 are distinct runs.** Revision 2's §4 cited `gpu3.log` for
both; that log is R6's three-suite run only, and R2's log was never
preserved. R1 likewise has no log. Both are marked accordingly rather
than backfilled.

## The onset is datable — and this supersedes the reduction matrix

`sweep-crdt` has 17 log files in this target directory. Counted **per
test copy**, not per stage:

| outcome | runs |
|---|---|
| both copies `... ok` | **13** |
| **neither copy executed** — the stage died compiling `pmacs` (`error[E0308]: mismatched types`), log `20260815T182846Z-708693` | **1** |
| both copies `FAILED` | **3** (`…-1977433`, `…-2144707`, `…-2375685`) |

Revision 4 said "14 runs, 11 green, 3 red on other tests" and that the
earlier reds "failed on unrelated tests". **Both were wrong**: the
count is 13 / 1 / 3, and one of the earlier non-passing runs is a
**compile failure that never reached either copy**, not a red on
another test. Of the genuinely red-on-other-tests sweeps, `…-2839374`
(08-15 09:55) failed protocol and version rows and `…-830195`
(08-15 18:37) failed `composition_overhead_under_ten_percent` and a
v21/v20 row — those two did execute `ctrl_c`, and it passed.

So the failure is **not long-standing**. Last observed green:
`20260815T185708Z`. First observed red: `20260816T063330Z`. The machine
was not rebooted across it — the current boot began 08-14 09:30.

**But this is not yet a source boundary.** Reflog and commit times put
HEAD at `7599661` during the last green (`3c06176` was committed 40 s
*after* that run finished) and at `724b785` during the first red
(`5174f73` was committed 08:45:41, after that run ended at 08:42:01 —
revision 4's manifest wrongly recorded F6 at `5174f73`). Cleanliness
was captured for **neither**, and the tree was being edited throughout.
So the window dates a **machine/worktree-state transition**, not two
clean source revisions.

**A source bisect is in fact positively discouraged by the evidence.**
`72da24a` is an **ancestor** of `7599661` — verified with
`git merge-base --is-ancestor` — yet `72da24a` fails today (F1) while
`7599661` passed on 08-15. A source-monotonic cause cannot produce
that. Whatever changed is environmental, cached, or uncommitted unless
proven otherwise.

## D0 — re-run the matrix with captured provenance

Before any §4 row is relied on for a conclusion, re-run the reductions
under a harness that records, per run and at the time: exact argv and
environment, worktree, `git rev-parse HEAD`, `git status --porcelain`
emptiness, the artifact hashes actually executed, the result, and the
log digest. Two constraints learned the hard way:

- run them **at `main`**, not on a feature branch — R1–R10 ran in the
  `panel-mapping-generation` worktree, which carries §5b changes;
- record the **artifact hash per run at run time**, since command shape
  changes it — the reason R9's result did not mean what it appeared to
  mean — and since a hash computed later reflects only what occupies
  that path now;
- **first, reproduce the two candidate endpoints CLEANLY** —
  `7599661` (last observed green) and `724b785` (first observed red) —
  each checked out clean, each in its **own isolated target
  directory**. Only if those endpoints differ is a Git bisect
  justified. If they do not differ, the changed state is environmental,
  cached or uncommitted, and bisecting source would burn runs proving
  nothing. The ancestry argument above says to expect the latter.