Files
pulse/docs
rcourtman 2c02075a24 Retire ChangeDetector's dead change-detection path (#2252)
Follow-up to #2234. Patrol stopped calling
`ChangeDetector.DetectChanges` when it moved to agentic execution
(1b1c9bb2a3). Recent-change context comes from the unified-resource
timeline, and the detector survives only as a fallback reader of the
legacy `ai_changes.json` that older releases wrote. #2234 removed the
detector's unjoined save. The detection code itself was still there, and
only tests used it.

## Removed

- `DetectChanges` and `detectResourceChanges`, which diffed snapshots.
- `ResourceSnapshot` and its `internal/ai` alias.
- Change-ID generation, and the seven description formatters with their
`formatBytes`/`formatFloat` helpers.
- The detector's lock. The history is loaded once at construction and
never modified, so reads need no lock.
- Tests of the detection logic, its heap stability
(`change_detector_memory_regression_test.go`) and ID uniqueness
(`changes_concurrency_test.go`).

## Unchanged

- `NewChangeDetector`, legacy loading and trimming.
- The read APIs: `GetChangesForResource`, `GetRecentChanges` and
`GetChangesSummary`.
- The `ChangeType` constants, which label the legacy entries.
- `intToString`, which the incident and remediation code share.

## Tests

The `internal/ai` tests that used detection to seed the fallback now
write a legacy `ai_changes.json` and load it. That is the path
production reads.

To check that the new seeding really exercises the load path, I broke
legacy loading through an overlay. 10 of the 12 re-seeded tests then
fail. The other two assert that the fallback is left out of a
type-scoped patrol, or that it loses to the canonical timeline, so empty
history also satisfies them.

That run also exposed three weak assertions, now tightened:
- Two formatter comparisons passed against an empty detector because `""
== ""`. They now reject empty output.
- One summary test used `t.Error` and then indexed `[0]`. It now uses
`t.Fatal`.

The ai-runtime contract now describes the detector as a legacy-history
reader.
2026-09-24 13:41:58 +01:00
..
…
2026-09-01 21:37:41 +01:00
2026-08-23 09:28:44 +01:00
2026-08-26 09:24:57 +01:00
2026-07-19 15:10:38 +01:00
2026-09-01 21:37:41 +01:00
2026-09-01 21:37:41 +01:00
2026-08-26 12:04:43 +01:00

Pulse documentation

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