Root cause: OpenCode's default compaction template uses --- separators.
When our plugin adds structured context (Memory candidates: format), the
model strictly follows the template, outputting --- at position 0. The
markdown textmate grammar treats this as YAML frontmatter, applying the
'comment' syntax scope (purple + italic in themes like palenight).
Fix: Set output.prompt in the compacting hook to replace the entire
template with a ---free version. Uses only ## Markdown headings and
explicitly forbids YAML frontmatter, horizontal rules, and delimiter
lines. Preserves context from other plugins by merging output.context.
- Replace compactionContextHeader() with buildCompactionPrompt()
- Set output.prompt instead of pushing to output.context
- Merge existing output.context from other plugins before clearing
- Add 'Instructions' section to the template (per architect review)
- Update tests: verify output.prompt, ---free format, context merging
- Changed '## Memory Candidates' to 'Memory candidates:' in compaction context
- Changed '## Pending Todos' to 'Pending todos:' in todo rendering
- Updated extractCandidateBlock() to parse plain text format (primary)
- Removed stripXmlTags() function (no longer needed)
- All 42 tests pass
Root cause: Markdown headings (##) render as purple in OpenCode UI,
same issue as XML tags and HTML comments. Plain text labels avoid
all special markup rendering.
- Use TS2345 error instead of loose 'errors' word
- Add try/finally for temp directory cleanup
- Remove duplicate placeholder test block
- Clarify quality gate placement in parseWorkspaceMemoryCandidates()
Ralph Chang