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fix(#214): make gsd-phase-researcher survive OpenCode write-tool truncation (#598)

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* chore: wire docs/agents config into AGENTS.md Agent skills section

Add the `## Agent skills` discovery block pointing the engineering
skills at the existing docs/agents/{issue-tracker,triage-labels,domain}.md
files (issue tracker, triage label mapping, single-context domain docs).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

* fix(#214): make gsd-phase-researcher survive OpenCode write-tool truncation

OpenCode caps model output at OUTPUT_TOKEN_MAX=32000 and the thinking
budget shares that pool (upstream opencode#18108). A single oversized
`write` tool call for RESEARCH.md is truncated mid-payload, yielding
`JSON Parse error: Expected '}'`, which OpenCode misclassifies and then
doom-loops retrying identically. Short content writes fine; long
content fails 100% (reproducible, OpenCode 1.15.10).

Add a Step 6 write contract to agents/gsd-phase-researcher.md: keep the
single-Write default (no behavior change for Claude Code and other
runtimes that don't truncate), but on a truncation/invalid-tool failure
build the file incrementally via a sentinel-based Write -> Read -> Edit
sequence so no single tool-call payload is large enough to truncate;
never silently fall back to returning content (which truncates
identically). This is the upstream-recommended mitigation (write in
smaller chunks; use edit for follow-on writes).

Locked with a prompt-contract regression test mirroring the bug-222
write-contract pattern.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

* chore(#214): add changeset for OpenCode write-truncation fix

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

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Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
Tom Boucher
2026-06-01 21:42:08 -04:00
committed by GitHub
parent a11ba2dfcb
commit 82fb847754
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---
type: Fixed
pr: 598
---
**`gsd-phase-researcher` no longer fails to write `RESEARCH.md` on OpenCode** — large research files that previously hit `JSON parsing failed: Expected '}'` and a retry doom-loop now write reliably. The agent keeps its single-write default and falls back to incremental section-by-section writes only when a runtime truncates an oversized tool call.