event-emit returned {written:false, reason:'CLAUDE_PLUGIN_DATA unset'} whenever the harness did not export the variable - the normal case for the Bash tool - so /trekexecute's Phase 8 events never landed. It now resolves the directory through stats-append's resolveStatsDir (one resolver; opts.path still wins, so intent-approval is unchanged). The CLI uses the realpath isMain() guard (the file:// guard was a silent no-op under a symlink or a path with a space) and exits 1 on every written:false - usage error, payload-not-json, failed write - instead of always 0. KNOWN_EVENTS gains main-merge-approved, main-merge-declined and gates_mode_flag_override, which /trekexecute emits by design. Header, intent-approval docstring (comment only), docs/operations.md and the README autonomy sentence (wrong state names, 'records each transition') updated.
Red: 10 of 20 tests fail on the pre-fix code - 7 new (CLI lands with CLAUDE_PLUGIN_DATA empty / absent, unwritable target exit 1, usage error exit 1, symlink, space path, known events) and 3 inverted contracts. Regression guards (green on arrival): never throws when unwritable; no second copy of the fallback directory name.
Inverted (the contract this changes, not deleted): emit with no CLAUDE_PLUGIN_DATA (silent skip) -> lands under a pinned HOME; never throws when unwritable -> a genuinely unwritable target (env {} now resolves to the real home); resolveStatsPath({}) === null -> the fallback path; malformed --payload exit 0 -> exit 1.
Readers checked: otel-export keys on 'event', yardstick counts only user_input, cache-analyzer and research-loop-cap name event-emit only in comments. Verify 268/268 (stats-event-emit, intent-approval, doc-consistency, otel-export-validators, yardstick). Suite 1376 (1374/0/2); non-hook lines in the real trekexecute-stats.jsonl 60 before and after.
Voyage order 20261005T104513Z-1250514346, plan step 2/5.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>