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os-sdlc: mutation ruling ledger (mutation testing increment 3) #1635

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opened 2026-11-08 15:24:33 +00:00 by jared · 1 comment

jared commented

2026-11-08 15:24:33 +00:00

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Problem

An agent judgment on a survivor or a test kind is lost after the run. The next run pays for the same judgment again. A tracked ruling ledger under .sdlc/ applies an old verdict without an agent when the key matches.

Reproduce

n/a: feature ticket.

Approach

Source: docs/research/mutation-testing/plan-v1-2026-11-08.md, table "Increments, in order", row 3. The section "Rulings" is binding; do not re-decide it. Decompose against the plan before implementation.

Origin

Trigger: plan docs/research/mutation-testing/plan-v1-2026-11-08.md (commit b90d8253), ruled by Jared 2026-11-07 and 2026-11-08
Improvised this session: none
Chain: suite doubled in six weeks (757 test files, 3,572 test methods) ← suspected duplicated behavior and tests with no demonstrated value ← no mutation evidence in the gate. End: DESIGN (docs/research/mutation-testing/plan-v1-2026-11-08.md)
Root candidate: none found; searched mutation, mutineer, mutant, survivor, taxonomy, redundant test, blind test, duplicate, overlap, ledger
Where: plugins/os-sdlc/.sdlc/ (new ledger TSV)
Session: ff703e34-8046-4b24-af68-6ef76d8aa338
Transcript: /home/jared/.claude/projects/-home-jared-dev-cc-os-plugins-os-sdlc/ff703e34-8046-4b24-af68-6ef76d8aa338.jsonl

VERDICT: CREATE

## Problem An agent judgment on a survivor or a test kind is lost after the run. The next run pays for the same judgment again. A tracked ruling ledger under `.sdlc/` applies an old verdict without an agent when the key matches. ## Reproduce n/a: feature ticket. ## Approach Source: `docs/research/mutation-testing/plan-v1-2026-11-08.md`, table "Increments, in order", row 3. The section "Rulings" is binding; do not re-decide it. Decompose against the plan before implementation. ## Origin - Trigger: plan `docs/research/mutation-testing/plan-v1-2026-11-08.md` (commit b90d8253), ruled by Jared 2026-11-07 and 2026-11-08 - Improvised this session: none - Chain: suite doubled in six weeks (757 test files, 3,572 test methods) ← suspected duplicated behavior and tests with no demonstrated value ← no mutation evidence in the gate. End: DESIGN (`docs/research/mutation-testing/plan-v1-2026-11-08.md`) - Root candidate: none found; searched mutation, mutineer, mutant, survivor, taxonomy, redundant test, blind test, duplicate, overlap, ledger - Where: plugins/os-sdlc/.sdlc/ (new ledger TSV) - Session: ff703e34-8046-4b24-af68-6ef76d8aa338 - Transcript: /home/jared/.claude/projects/-home-jared-dev-cc-os-plugins-os-sdlc/ff703e34-8046-4b24-af68-6ef76d8aa338.jsonl VERDICT: CREATE

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2026-11-08 15:24:33 +00:00

jared changed title from ~~os-sdlc: test taxonomy classifier (mutation testing increment 2)~~ to os-sdlc: mutation ruling ledger (mutation testing increment 3)

2026-11-08 15:24:53 +00:00

jared referenced this issue

2026-11-08 15:25:02 +00:00

os-sdlc: whole-codebase mutation pass (mutation testing increment 4) #1636

jared referenced this issue

2026-11-08 17:53:48 +00:00

os-sdlc: test taxonomy classifier (mutation testing increment 2) #1634

jared referenced this issue

2026-11-08 18:07:27 +00:00

os-sdlc: test taxonomy classifier (mutation testing increment 2) #1634

jared referenced this issue

2026-11-08 19:15:13 +00:00

os-backlog CLI has no label-add or label-remove command #867

jared referenced this issue from a commit

2026-11-08 19:25:46 +00:00

docs(decisions): ruling 83, fix #1642 and #1643 before #1635

jared referenced this issue

2026-11-08 19:26:43 +00:00

Takedown relevance judge rejects ruled feature tickets as not relevant #1642

jared commented

2026-11-08 20:40:39 +00:00

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Resolution

Done: MutationTest::Ledger keeps survivor and test-kind judgments in tracked .sdlc/mutation-rulings.tsv; MutationTest#outcome and Taxonomy#kind apply a matching row with no agent; os-sdlc-mutation-rule appends a row.

Evidence: commit 2cada04a on main; suite 3576 runs 0 failures; rubocop clean on 14 files; history row in docs/implementation-status/os-sdlc.md

Follow-ups: none

## Resolution **Done:** MutationTest::Ledger keeps survivor and test-kind judgments in tracked .sdlc/mutation-rulings.tsv; MutationTest#outcome and Taxonomy#kind apply a matching row with no agent; os-sdlc-mutation-rule appends a row. **Evidence:** commit 2cada04a on main; suite 3576 runs 0 failures; rubocop clean on 14 files; history row in docs/implementation-status/os-sdlc.md **Follow-ups:** none

jared closed this issue

2026-11-08 20:40:39 +00:00

jared referenced this issue from a commit

2026-11-08 20:57:21 +00:00

feat(os-sdlc): mutation ruling ledger applies old survivor and test-kind verdicts (#1635)

jared referenced this issue from a commit

2026-11-08 20:57:21 +00:00

docs(os-sdlc): history row for #1635 ledger; plan status, rulings 84 and 85