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fix(hooks): differentiate burst and edit-ratio heuristics on tool type

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The burst counter incremented on any tool call <30s apart regardless of
tool type, so a bulk read of many files produced the same "Rapid-fire"
alert as a rapid-fire editing sequence. The edit-ratio check reported
"possible stuck/spiral" for any session under 10% edits past 30 minutes,
which a read-heavy analysis session satisfies structurally whether or not
the work is productive. Both mechanisms are confirmed in
docs/BRIEF-vurdering-v2.md, verification points 1a and 1b.

tool-tracker.mjs now tracks whether the current burst run consists only
of read tools and suppresses the rapid-fire alert for such runs. A
read-dominant session (>=70% reads) reports its low edit ratio as
context rather than as a stuck/spiral claim, and never as the sole
reason for a warning. Bursts involving Edit/Write/Bash and
non-read-dominant sessions behave exactly as before.

No new data is recorded: the differentiation uses tool_name, which
events.jsonl already logs. The privacy design is untouched.

Tests first (Iron Law): 5 cases in tests/tool-tracker.test.mjs, 3 of
which failed against the previous implementation, 2 of which are
regression guards that passed before and still pass.

Verified: node --test tests/*.test.mjs -> 263 pass, 5 fail. All 5
failures are the perf wall-clock assertions, which fail identically on
HEAD without this change (measured by stashing and re-running) — they
are a pre-existing property of this machine, not a regression.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_011wMhJuPFUiWqKLSQjrzCXP
This commit is contained in:
Kjell Tore Guttormsen 2026-08-13 20:59:42 +02:00
commit 2c9e2de00a
5 changed files with 141 additions and 13 deletions
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10
hooks/scripts/lib.mjs
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@ -133,6 +133,16 @@ export const THRESHOLD_SOFT_DEP_FLAGS = 2;
export const THRESHOLD_HARD_DEP_FLAGS = 5;
export const COOLDOWN_SOFT = 1800;
export const COOLDOWN_HARD = 3600;
// Read-only tools. A sequence of these is bulk reading (research, audit,
// bulk file review), not rapid-fire editing — the burst and edit-ratio
// heuristics must not treat the two as the same signal.
export const READ_TOOLS = Object.freeze(['Read', 'Grep', 'Glob', 'NotebookRead']);
export function isReadTool(tool) {
return READ_TOOLS.includes(tool);
}
// Share of read tools above which a session counts as read-dominant.
export const THRESHOLD_READ_DOMINANT_RATIO = 70;
// v1.1.0 — counting threshold; tier-reduction logic is v1.2 scope
export const THRESHOLD_PUSHBACK_FLAGS = 2;