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5facd8738b
Primary change: prevent the model from burning tokens in an infinite retry loop when a tool call repeatedly fails schema validation with the same error (observed with ask_user_question and a malformed `questions` parameter retrying 10+ times with the same validation error). - Track consecutive validation failures per (tool name, error message) pair in CoreToolScheduler via a `validationRetryCounts` Map. - After 3 consecutive failures for the same (tool, error) pair, append a RETRY LOOP DETECTED directive to the error response instructing the model to stop, re-examine the schema, try a fundamentally different approach, or surface the issue to the user. - Reset per-tool counters when the tool invocation succeeds; reset globally when an incoming batch shares no tool name with any previously failing tool; reset the per-tool counter when the tool returns a different validation error so unrelated mistakes do not accumulate toward the threshold. - Distinct from LoopDetectionService, which tracks model-behavior loops (repeated thoughts, stagnant actions); this change catches tool-API misuse loops at the scheduler layer. Piggyback fixes bundled in the same PR: - packages/cli/index.ts, packages/core/src/services/shellExecutionService.ts: treat PTY `EAGAIN` on the read path as an expected read error alongside `EIO`, avoiding noisy surface-level failures from transient non-blocking reads. - scripts/build.js: switch the settings-schema generation step from `npx tsx` to `node --import tsx/esm` for Bun compatibility. Tests: - Unit tests in coreToolScheduler.test.ts cover: directive injection on the 3rd consecutive failure, counter reset when a different tool is called, and counter reset after a successful invocation of the same tool (fail → fail → succeed → fail → fail must not trip the directive). |
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