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feat(voyage): add lib/exporters/textfile-format.mjs — Prometheus text-format pure transform SC #12

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Step 9 av v4.1-execute (Wave 2, Session 3).

Pure function transformToPrometheus(records) → Prometheus text-format 0.0.4.

Hard rules:
- NO client-side timestamps (research/01 node_exporter#1284 mitigation)
- Allowlist-redacted records ONLY (caller responsibility — Step 11 enforces)
- UTF-8 metric names normalized: lowercase, [.\\-\\s] → _, voyage_ prefix
- Empty input → empty string output
- Sorted output for determinism (snapshot-test-friendly)

Heuristic metric typing:
- counter: *_total, *_count, *_passed, *_failed, *_skipped
- histogram: *_ms, *_duration, *_p\\d+, *_seconds
- gauge: everything else (Prometheus convention)

Snapshot: tests/fixtures/expected.prom byte-for-byte match.
Regenerate: node scripts/gen-expected-prom.mjs > tests/fixtures/expected.prom

Tester (6 nye, baseline 400 → 406):
- Snapshot byte-for-byte match (SC #12)
- Empty input handling (null, undefined, [])
- Allowlist-redaction sanity (post-bash-stats uten command_excerpt)
- NO client-side timestamps (token-count-assertion per linje)
- normalizeMetricName edge-cases
- Determinism (identisk input → identisk output)

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
This commit is contained in:
Kjell Tore Guttormsen 2026-05-09 09:30:58 +02:00
commit 2349d1d431
5 changed files with 297 additions and 0 deletions
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plugins/voyage/tests/fixtures/stats-sample.jsonl vendored Normal file
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{"_schema_id":"trekplan","ts":"2026-05-09T08:00:00.000Z","slug":"add-auth","mode":"default","codebase_files":156,"agents_deployed":7,"deep_dives":2,"research_briefs_used":3,"profile":"premium","profile_source":"flag"}
{"_schema_id":"trekexecute","ts":"2026-05-09T08:30:00.000Z","plan":"trekplan-add-auth.md","plan_type":"plan","mode":"execute","result":"completed","steps_total":12,"steps_passed":12,"steps_failed":0,"steps_skipped":0,"profile":"premium","profile_source":"inheritance"}
{"_schema_id":"trekreview","ts":"2026-05-09T09:00:00.000Z","slug":"add-auth","verdict":"ALLOW","reviewed_files_count":18,"mode":"default","duration_ms":4521,"profile":"balanced","profile_source":"flag"}
{"_schema_id":"trekbrief","ts":"2026-05-09T07:00:00.000Z","slug":"add-auth","mode":"default","interview_turns":7,"review_iterations":2,"research_topics":3,"profile":"economy","profile_source":"env"}
{"_schema_id":"trekresearch","ts":"2026-05-09T07:30:00.000Z","slug":"add-auth","mode":"default","scope":"both","dimensions":4,"agents_local":5,"agents_external":3,"contradictions":1,"open_questions":2,"profile":"premium","profile_source":"default"}