reliquary/docs/workpad/reports/2026-10-17-01-gremlins-post-merge-checks.md

Gremlins post-merge live checks (B7, B4, B8)

Date: Sat 2026-10-17 00:58-01:05 (local). Run by claude-sonnet-5-5. Gremlin model: claude-haiku-5-5 (effort low). Binary 2.1.299, Windows 10 Git Bash. main @ e6843ca (Spire 0.3.0). Scratch: throwaway git repo + run log in the session scratchpad pm/. G = uv run --script plugins/spire/skills/gremlins/gremlins.py.

1. B7 rebase live

Commands: G init --run run.md --model claude-haiku-5-5 --effort low --cwd repo; G train --base b1; commit add sub in repo (4a14b1b -> 93e419d); G rebase --base b1 --brief rebase.md; G spawn --job s1, then --job s2.

Call	status	session	cache	cost	cumulative	delta
b1-train	ok	57dde9a1	-	0.003195	0.003195	0.003195
b1-rebase1	ok	57dde9a1 (unchanged)	hit	0.000816	0.004011	0.000816
s1 (fork of rebased b1)	ok	c7997b70	hit	0.001339	0.005350	0.001339
s2 (fork of rebased b1)	ok	6eb566c4	hit	0.001437	0.005448	0.001437

• The plain resume keeps the same session id; bases/b1.json got commit 93e419d, one rebases[] entry (from_commit 4a14b1b), cost_cumulative_usd 0.00401097.
• The rebase answered from the new calc.py (saw sub and the commit): the delta header worked.
• Cost delta adds up: 0.003195 + 0.000816 = 0.004011 = the base's stored cumulative (0.00401097, the sum of its modelUsage costUSD), so the basis after a plain resume is right (open assumption closed). Forks use the base's 0.004011 as their basis (s2 is not added on top of s1), as designed.
• Cost: $0.0068. Verdict B7: ticked.

2. B4 orphan case (long single child)

• First try (job long, brief python -c "import time; time.sleep(300)"): ended ok in 10 s, gremlin's shell has no python (exit 127, python: command not found). Not usable.
• Retry with the absolute interpreter (.../uv/python/cpython-3.13.1-windows-x86_64-none/python.exe -c "import time; time.sleep(300)"), job long2 then long3, each run_in_background: true. Process table (Win32_Process) snapshotted before the spawn and at ~35 s; the tree below is from long3, the live sleeper is the leaf. TaskStop at 01:02:19 returned "Successfully stopped". long2 was stopped the same way; its ~5 s reading was lost to a scripting error of mine (only ~35 s read: all gone).

PID	name	role	~5 s after stop	~30 s after stop
6168 / 12152 / 37052	bash.exe	harness wrappers of the spawn call	gone	gone
31532	uv.exe	uv run --script	gone	gone
38504 -> 38140	python.exe x2	gremlins.py	gone	gone
37772	claude.exe	gremlin (= child_pid)	gone	gone
7216 -> 12540 -> 28456	bash.exe x3	gremlin's Bash tool wrappers	gone	gone
12920	conhost.exe	console of the Bash tool	gone	gone
38816	python.exe	the 300 s sleeper (in flight)	gone	gone

• No process survived; no kill issued by me. The sleeper was alive at ~35 s after spawn and gone 5 s after the stop.
• State after the stop: jobs/long3.json status: running, ended: null; ledger has no line for long2 or long3 (5 lines: train, rebase1, s1, s2, long). Matches SKILL.md "Stopping a gremlin".
• The spec §7 "orphan can survive" case did not occur on Windows Git Bash: SKILL.md's "known leftover" sentence is not reproduced here (still possible on other platforms).
• Cost: ~$0.0045 (long 0.001506; long2/long3 unrecorded, est. <= 0.0015 each). Verdict B4: ticked (Windows Git Bash; the in-flight child dies with the tree).

3. B8 non-Windows

• wsl -l -v: Ubuntu-20.04 (WSL2, Python 3.10.12, uv present, git present); no claude binary and no ~/.claude in it.
• cd plugins/spire/skills/gremlins && uv run --no-project --python 3.12 python -m unittest discover -s tests in WSL (uname: Linux 6.18 x86_64): 24 tests, OK, 5.6 s (same count as the Windows gate). git status clean afterwards (PYTHONDONTWRITEBYTECODE=1).
• Live train + spawn in WSL: not run. Claude Code is not installed or signed in inside WSL; installing it is setup, which the brief forbade. Running the Windows claude.exe via interop would not test Linux.
• Cost: $0. Verdict B8: partly (unit tests on Linux pass; the live Linux run is still open: needs claude installed and logged in inside WSL).

Totals

Spend about $0.011 (limit $1). Repo untouched except this report. Scratch repo and run state left in the scratchpad pm/. No processes of mine left running.