makelore/.project-docs/30-worklog/tasks/20260928-agent-reply-truncation-c812b59f.md

Task: Diagnose truncated consultation reply and raw-content fallback

Identity

• Task ID: 20260928-agent-reply-truncation-c812b59f
• Mode: Feature
• Branch: codex/20260928-agent-reply-truncation-c812b59f-agent-reply-truncation
• Worktree: /Users/chillishark/Makelore 麦洛/.codex-worktrees/makelore/20260928-agent-reply-truncation-c812b59f
• Base commit: 4495345fb0
• Owner: codex
• Status: Ready for Integration

Scope

• Diagnose the screenshot showing only a short prose fragment followed by a legacy parse-failure notice and raw structured output.

Intent And Constraints

• Read-only investigation requested. No product edits, history changes, app restart, paid question, cloud access or deployment.
• Ownership and planning gates passed in this task checkout. Reused unchanged canonical context from the prior turn; read all current peer task scopes. Current trial Main 9adab45 / Renderer cb48f60 belongs to the separate reply-cleanup task and is distinct from main 4495345. Inspected committed code only; peer working files remain untouched.

Outcome

• The screenshot notice maps to the legacy structured-response parse fallback. The UI retains unparsedResponse separately from the recovered prose, so content in the raw box was received even though normal presentation failed.
• Independently reproduced an exact-shape failure: an unescaped ASCII quote after the opening prose causes JSON parsing to fail, while stringToken/recoverReply accepts only the prefix as a complete reply. The old parser returns the same short-prefix + screenshot notice combination. The newer shared/teacher-reply fields recovery in committed 9adab45 still accepts the same premature prefix.
• This is a demonstrated mechanism, not a confirmed trace of the screenshot request. The exact question/response was not found in the known trial/installed-app project teacher histories. The screenshot shows only the tail of the raw output, so its precise triggering bytes and provider termination reason remain unknown.
• Cloud structured replies use completed run.output; missing intermediate stream deltas do not explain a complete raw body being cut by this recovery path. Do not claim all provider truncation/format causes are excluded.

Verification

• Read old shared/teacher-discussion.ts stringToken/recoverReply/parser fallback, UI diagnostics rendering, service/discussion persistence and cloud-runner final-output handling.
• Independent agent performed an in-memory execution of both committed parsers with malformed quoted prose and reproduced the truncated prefix. No tests or product files added/modified.
• Inspected only relevant local app runtime descriptors/project catalogs and teacher conversation records to seek the screenshot request; no matching request found. No credentials read or emitted.
• Project-document structure, task ownership drift and whitespace checks passed.

Follow-ups

• If repair is requested, fix conservative recovery in the current reply-only implementation, preserving exact raw diagnostics; do not restore retired discussion components. Verify the exact request raw prefix/provider finish reason before assigning a unique cause to this screenshot.

Promotion Candidates

• None. This read-only diagnosis adds evidence and a repair direction, not an accepted product behavior change.

Agent Log Screenshot Follow-up

• Same-task start/status matched; reused unchanged project context and reviewed the new welcome-diagnosis/latest cleanup peer scope. Read-only gate passed; no product or live state edits.
• User supplied an Agent log screenshot containing the visible prefix {"reply":"它早就不是"刚搭好架子"那种阶段了—— followed by a substantial prose answer and legacy structure payload. The earlier client screenshot shows exactly the prose prefix 它早就不是, the legacy fallback notice, and the later tool payload in the raw-content box.
• Independent reviewer replayed the visible prefix in memory against the old discussion parser and committed 9adab45 reply parser. Both cut at precisely the same quote. Together the screenshots locate the observed short-body symptom to malformed-format handling/recovery, strongly contradicting a stream that delivered only the first few characters.
• Distinguish upstream malformed structured output from downstream unsafe recovery: model-produced internal quotes need valid encoding, and the client must not accept an ambiguous prefix as complete prose. This is parsing before rendering, rather than visual clipping.
• Evidence remains screenshot-level, not a request-correlated byte capture. A log renderer could alter escape display, so do not claim the full transport was byte-for-byte audited or all possible transport issues were excluded. No corrective code has been applied.