Applies ersatztv#784's who-benefits test to this change's own prose: if only
the author's timeline explains why a sentence is there, it is narrative. Three
comments said "the first version of this did X" where the reader only needs the
hazard and the reason nothing downstream would catch it.
One of the three turned into a real correction rather than a reword. The
byte-exactness test was justified as "the A/B does not cover this", which is
sharper and also true: the A/B compares the two halves against each other, so a
wrapper that truncated BOTH would pass it. Only comparing against the literal
expected bytes catches that.
Refs: #776
Refs: #784
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
In this harness version only `Stop` hooks emit a structured transcript record.
`PreToolUse` and `PostToolUse` hooks leave no durable execution trace — which is
every guard this repo relies on. #773 §5.4 could therefore only count filename
mentions in settings dumps, i.e. inference, so a silently broken hook looked
identical to a working one indefinitely.
Each hook now sources one shared sink, `scripts/hook-fire-log.sh`, and records a
`fire` record on entry and an `exit` record carrying its status and decision. The
decision is parsed from the bytes the hook actually emitted rather than declared
by the author: Claude hooks always exit 0 and decide by printing JSON, so stdout
is diverted and replayed; git hooks decide by exit code and stream their output,
so theirs is left alone. That avoided ~40 edits inside pretooluse-merge-consent
and records what the harness sees rather than what the author meant.
The instrumentation sits in the stdin/stdout path of the most authoritative
guards in the repo, so transparency is the load-bearing claim, not coverage:
test_instrumentation_changes_NOTHING_the_harness_can_see drives every hook with
and without it over a payload matrix reaching each hook's deciding branch, and
demands byte-equal stdout and equal exit status. It shipped with two defects that
only that shape catches — `out=$(cat f)` stripping a trailing newline, and an
unconditional stdin slurp that hangs on a TTY and would have frozen every
interactive `git commit`. Both are now pinned, the second through a real pty.
fixes#776
Decisions-Edit: yes
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
timothyandClaude Opus 5