Root cause of "fn_review_spec was never called" tracked through the diagnostic
chain: the prompt actually sent to triage agents has zero `fn_*` tokens —
because resolveAgentPrompt("triage", ...) returns the BUILTIN_AGENT_PROMPTS
default-triage template (TRIAGE_PROMPT_TEXT in core/agent-prompts.ts), and that
template was forked from an older version that never had the "MUST call
fn_review_spec()" workflow nor any fn_-prefixed tool names. The fallback
`|| TRIAGE_SYSTEM_PROMPT` in engine/triage.ts never fires because the core
template is non-empty.
So the model writes PROMPT.md, doesn't see any instruction to review it, and
ends. zai/glm-5.1 happened to call fn_review_spec from training-pattern
inertia; Sonnet via pi-claude-cli stopped at write — same prompt, same bug.
Replace TRIAGE_PROMPT_TEXT with the engine's up-to-date TRIAGE_SYSTEM_PROMPT
verbatim (fn_-prefixed tools, fn_review_spec workflow, subtask breakdown,
project-commands handling, frontend UX criteria injection). Also remove the
diagnostic-only console.error lines added during this debugging session — the
core fix is now elsewhere and the noise isn't worth keeping.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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