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* test(#3065): build the load-bearing contract gate ADR-1671 promised Epic #1671 Phase 7. A post-merge audit of every promise in ADR-1671 against the merged tree found one mitigation asserted-but-absent and two stale records. ADR-1671 names exactly one correctness risk — trimming a load-bearing fragment, with the recorded history of a paraphrased META.RULE causing agent violations — and #2931 amended its mitigation to a deterministic contract gate that proves no load-bearing fragment was omitted or shrunk, treats a floored fragment as a success, and asserts the isolate prefix survives byte-identical, with an explicit anti-vacuity rule. That gate did not exist. What existed was tests/context-composer.test.cjs: synthetic unit tests of the composeWithinBudget primitive over invented fragments, asserting nothing about real declared strategies. The ADR asserted a mitigation that was never built, which is the promised-but-not-built shape the epic's own coverage discipline exists to catch. The gate derives its load-bearing set from declared verbatim strategies rather than a hand-maintained list, so it cannot go stale as upstream changes. It sweeps budgets from 4x total down to a quarter of total and asserts at every step that no load-bearing id appears in omitted or shrunk, that isolatePrefix is byte-identical, and that hardFailed is surfaced rather than silently passed. Both anti-vacuity guards are EXECUTABLE, not comments. One proves the empty load-bearing set guard actually throws. The other proves a sweep that never applies pressure is rejected — because a gate that only ever runs unpressured is exactly how the original mitigation went missing without anyone noticing. Measured: underPressure true at 6 of 7 budgets, false only at 4x total. Three ADR records corrected in the same change, all doc-vs-reality drift: - Decision item 2 describes a composer that trims by priority to fit a measured per-runtime cap. composeWorkflow in fact passes MAX_SAFE_INTEGER with every fragment verbatim (both verified in source), so no trimming happens there; the emitted-byte cap is a separate measure-and-fail gate and Windsurf's limit a bespoke truncation. The wording described an option as shipped behavior. - flag:--converge never reached a terminal state. #2992 withheld six atoms; five were resolved explicitly. This one was resolved in code by reusing state:plan-strategy-converge but recorded nowhere — the same gap #2995 closed for flag:--verify-only, and I closed five of six. - The open-questions list enumerated three questions while two Resolved-by blocks resolved an unlisted Question 4. It is now listed. Refs #3065 * fix(#3065): make the gate assert over production, not a copy of it The isolated review found a blocker, and it was fatal to the gate's purpose: it hand-copied applyBudget's fragment array into the test, so flipping a strategy in src/prompt-budget.cts — say roadmap from verbatim to drop — would leave the gate computing from its own untouched copy and still passing. A guard built as an instance of the very divergence class it exists to prevent (DEFECT.GENERATIVE-FIX) is worse than no guard, because it reports green. Fixed by eliminating the duplicate rather than adding a parity assertion, the same resolution used for the FAMILIES table in #2996. applyBudget's inline construction is extracted to an exported buildBudgetFragments(), which both applyBudget and the gate now call; the 1024 plan floor is exported as PLAN_FLOOR_CHARS instead of being re-declared in the test. The extraction is pure — verified behavior-preserving at budget=2000: hardFailed false, omitted ['context'], projectMd shrunk, plan truncation ~27.8%, all headers present. There is no longer a second copy to diverge from. Also fixed a vacuous assertion the same review caught: isolatePrefix was pinned across the sweep, but no production fragment sets isolate:true, so the value is always '' and the check could never fail. The pinning assertion stays, with an honest comment that nothing in production sets it today, and a second test now constructs an isolate:true fragment set and proves the prefix is non-empty and byte-identical across a roomy and a severely tight budget — which is what makes the first assertion capable of detecting a real change. Refs #3065 * chore(#3065): backfill changeset pr number to 3068 --------- Co-authored-by: sim <sim@local>
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type, pr
| type | pr |
|---|---|
| Fixed | 3068 |
The composer's load-bearing-fragment guarantee is now enforced, not just documented — ADR-1671 promised a deterministic gate proving no load-bearing content is dropped or shrunk when context is trimmed to fit a budget; only synthetic unit tests existed. The gate now runs against real declared strategies and fails if it would ever assert over nothing. (#3065)