richm-spp c802c33abc fix(hooks): emit suggest-compact via hookSpecificOutput stdout ...

The threshold and interval suggestions in suggest-compact.js are written
to stderr via log(). Per the Claude Code hooks guide, non-blocking
PreToolUse stderr (exit code 0) is only captured in the debug log — it
does not reach the model. As shipped, the script's nudge to /compact is
silent on Claude Code 2.1.x.

Fix: alongside the existing log() call (kept for debug-log capture),
emit the same suggestion as structured JSON on stdout:

  { hookSpecificOutput: {
      hookEventName: "PreToolUse",
      additionalContext: msg
  } }

This is the documented mechanism for a PreToolUse hook to inject
context into the next model turn without blocking the tool call.

Verified end-to-end on Claude Code 2.1.142 (VSCode native extension,
Windows 11) — the additionalContext now surfaces in the next turn as
a <system-reminder> block. Counter increment and exit code behavior
unchanged.

Tests: 4 new cases in tests/hooks/suggest-compact.test.js covering
stdout JSON at threshold, stdout JSON at +25 interval, silence below
threshold, and stderr-retention for the debug log. Suite goes from
19/19 -> 23/23 (suggest-compact) and full run-all stays clean for
the unaffected suites (the 4 pre-existing Windows broken-symlink
failures in ci/validators, lib/session-manager, and lib/utils are
unrelated to this change).

2026-05-15 09:48:28 +10:00

3.8 KiB

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