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When an incremental-sync cursor retains the original field selection, adding a field to the initial-request code is insufficient for existing sync sessions. Treat the saved cursor as part of the rollout contract: prove both fresh and already-established sessio…
When hotfixing a schema change onto a branch that lacks earlier migrations, preserve the authoritative migration sequence rather than cherry-picking only the later migration. Cherry-pick the prerequisite schema/feature commit first, then the dependent migratio…
When this applies: a digest-pinned Python base image is externally managed, while an application image must install a separately locked runtime environment into that interpreter. Use the explicit package-manager override only at the controlled mutation sites, …
Migration PRs that share an append-only ledger must be rebased after any competing migration lands, and their generated migration suffix/snapshot must be regenerated from the new base before merge. This avoids two different migrations claiming the same ledger …
A deployment dependency is not actually complete if a downstream-required artifact build was deferred and later fails. When that happens, reopen the producing work, correct and re-approve the artifact definition, and prevent the deployment task from inventing …
Calendar evidence must be validated from its original components, not by successful runtime parsing. This applies whenever OCR/model output or external payloads influence identity, eligibility, or reconciliation: accept only explicit documented formats, round-…
A release gate for a containerized service must execute the complete image build from the exact pinned base digest; static assertions about the Dockerfile, dependency lock, and runtime contract are necessary but do not prove that the pinned base's package-mana…
When parallel pull requests target the same integration branch, merging one moves the base of every remaining PR; a green or “cleanly mergeable” badge does not preserve review and test evidence that was pinned to the old base. Where delivery policy requires ev…
When two branches independently generate the same numbered append-only migration, preserve the target branch’s published migration and regenerate the feature branch’s schema delta from that updated snapshot as the next migration. Do not hand-merge generated sn…
A branch-scoped repository write guard must recognize Git’s transient detached-HEAD states during rebase and map them back to the recorded branch; otherwise it can deadlock recovery by blocking both conflict-resolution commands and rebase abort. This applies w…
Transfer UI behavior and caller identity depend on call topology, not whether an agent briefing is spoken. When a “direct” entry point still creates a separate outbound SIP participant and later moves it into the inbound room, disabling the briefing only short…
A partial consumer model should validate its declared fields strictly while ignoring undeclared producer fields. This applies when the consumer intentionally needs only a stable projection of a larger, evolving payload; it does not apply when the model is mean…
Strict consumer contracts should be verified against the authoritative producer's serialized output and every already-supported downstream shape; self-authored fixtures prove only internal consistency. This applies when compatibility is promised. Intentional n…
A tool-contract benchmark gain can be a real caller-facing functional gain when a tool-only runtime suppresses model-authored plaintext and substitutes deterministic recovery speech. This applies to interactive voice nodes whose frame pipeline enforces tool-on…
General lesson: A typed trace contract should model producer-observed evidence, not every shape that permissive downstream adapters happen to accept. This applies when legacy compatibility, normalization aliases, and semantic enrichment coexist with raw event …
Freeze the complete case object used for review hashes before parallel labeling; keep later reporting categories in a sidecar. A category-only metadata edit can invalidate every review binding even when the model input and the semantic label are unchanged. Wh…
Digest-bound reviews should be repaired by re-binding the original reviewers’ unchanged semantics to the one canonical case projection, never by editing digests in place or letting a coordinator impersonate a reviewer. This applies when a mechanically irreleva…
Standalone visual-fixture specs under a broad Playwright test directory should be explicitly isolated from the production suite. When a fixture depends on its own Vite server or custom configuration, add its path to the main Playwright config's testIgnore and …
Treat output exposure as an irreversible review-provenance boundary: whenever labels may feed supervised training or held-out evaluation, a reviewer who has seen the model response, tool result, or another reviewer’s label can produce useful diagnostic proposa…
Broad label generation should be treated as a diagnostic queue, not manual approval. Require input-bound case digests, exact latest-caller spans for every grounded argument, truthful output-exposure attestations, and two genuinely independent reviewers before …
When removing a UI surface end to end, trace actual data dependencies before deleting similarly named backend endpoints. A shared bootstrap can support both removed pages and a retained workflow; in that case, slim its response to the retained contract, delete…
Candidate guides for agent-backed coding assessments should be organized around the product’s distinct state boundaries: one-time invitation, timed assessment, resumable agent window, ended workspace, saved immutable revision, assessment submission, external p…
When constructing SFT data from operational tool traces, label the model decision and the downstream result on separate axes, and keep future evidence out of the model input. This applies when later turns or handler outcomes help humans decide whether an earli…
To separate model learning from runtime protection in a paired 2×2 evaluation, capture and hash each base-model response once, then replay those identical bytes through both the current and candidate harnesses; repeat for the SFT model. Score raw model route/a…
A streaming compatibility layer can deliver correct tool-call events yet lose the tool in the SDK's assembled final response. Test both consumption paths: direct event iteration and the SDK stream helper's final object. A terminal snapshot that contradicts ear…
Rerun the preserved baseline contemporaneously when testing a LoRA target-module change, and audit baseline reproducibility separately from the candidate-versus-baseline score. Identical model hashes, ordered requests, greedy settings, and prompt-token counts …
When a model runtime multiplexes commentary and final-answer text through the same delta event, forward only text whose phase has been authoritatively identified. This applies to candidate-facing or other restricted UIs that need useful progress without exposi…
Cancellation should drain a pending tool transition only after that transition’s own result/context callback has completed; the existence of a pending transition alone is not a safe readiness signal. System/cancel frames can overtake queued result frames, so a…
Pin the code that defines inherited provenance checks before importing or trusting its tables. A derived experiment may validate every data/config hash listed by an earlier launcher yet still have a circular trust gap if that launcher itself is not checked aga…
In responsive cards, an `auto minmax(0, 1fr) auto` grid can collapse the copy column when the trailing action group has several intrinsic-width controls. This applies when the number or width of actions varies and the card can be narrower than the page viewpor…
Treat a declared terminal event as the transport boundary, not merely as another streamed item. This applies when a streaming protocol guarantees that an event such as `completed` is the authoritative end of a unit of work: after parsing and delivering it, the…
General lesson: when conversational evaluations contain repeated identical inputs or multiple decisions from one call, report sensitivity under at least three units—decision, unique canonical model input, and call. Give each unit equal total weight and average…
Preserving a logged message object does not establish that the model received its instructions: a chat template can silently omit an unsupported role. Before an offline comparison, probe the pinned tokenizer/template with a synthetic sentinel in each relevant …
Reconstructed offline evaluations need two independent bindings: preserve the semantic prefix exactly enough to label the next action, then explicitly normalize only what the pinned serving tokenizer/runtime requires. This applies when historical request wire …
When a preview screen also acts as the commit boundary for an immutable execution manifest, removing the preview UI must not remove that boundary. Move manifest creation into the remaining explicit selection action, retain manifest identity and digest through …
When a candidate-facing agent view should show only the final answer, filter at semantic message completion using the provider's message-phase metadata; hiding tool cards or concatenating streaming deltas is insufficient because commentary and final answers ma…
Automation guards must preserve a compliant path for delegated, commit-only work. A Linear kickoff that always creates and pushes a draft PR conflicts with an explicit no-push/no-PR task boundary, and can prevent even harmless repository inspection; either pro…
A request for typed validation should normally be satisfied with the mature schema library native to the service’s existing runtime; introducing a second language or service solely to use a named validation library increases deployment, queue, and failure boun…
Time-bound campaigns should define a half-open eligibility window from two local datetimes plus one IANA timezone, validate the three values as a unit, resolve them to absolute instants once, and fail closed if configuration is missing or invalid. This prevent…
A transferred handset showing the receiving DID does not by itself prove that a provider rewrote the original caller ID. If the system retries a rejected original-ANI origination with the receiving DID, the displayed DID can be the expected result of the fallb…
A squash merge creates a two-SHA verification boundary: even when the reviewed PR tree and the merged tree are byte-identical, commit-pinned CI and review evidence still names the old SHA. On repositories that invalidate evidence after commit or base movement,…
A branch/PR kickoff helper should be idempotent before performing commits: when an issue branch and pull request already exist, detect and reuse them before creating or pushing another kickoff commit. This matters when a repository guard instructs an agent to …
A time-bound notification should be owned by the exact domain transition it promises, not by a broad “resolved-success” status helper or only by a parent/group transition. Status models often collapse a primary success with later lifecycle completion, and one …
When an experiment promises unchanged model inputs, structural object equality may be too weak: dictionaries can compare equal even though their serialized key order differs. If a chat template renders that order, the token sequence can change. Compare the act…
Strict runtime-validated sinks need producer-contract tests even when the sink itself is mocked. When a producer sends an event or record to a strict canonical parser, a mocked writer can make an invalid payload look valid. The producer test should capture th…
Separate evaluation-topology invariants from staging compatibility requirements. Serial requests, balanced arm rotation, simultaneous adapter loading, and research-only network topology can be necessary to reproduce a controlled comparison without being requir…
Deferred transitions can stall when a framework clears its busy state on cancellation but does not invoke the normal completion callback. Treat readiness and notification as separate contracts: enumerate every path that clears the blocker, and ensure each wake…
A frozen acceptance document is not an executable gate merely because its file hash appears in a generic evidence list. This distinction matters when integrity tests validate request topology, raw evidence, identities, denominators, and scorer reproducibility …
When enlarging a reviewed synthetic cohort, distinguish immutable case/review bindings from regenerated export metadata. This applies when one combined manifest digest is embedded in every exported record: adding reviewed cases can legitimately change an older…
Exact-match regression gates should treat wrong→wrong transitions as a separate safety class, not as neutral ties. A new output can remain scored wrong while becoming materially more dangerous—for example, changing a conservative clarification into valid-schem…