Opencode support

[jbendotnet]

Closes #86

Adds OpenCode support to skill-doctor, allowing it to grade local OpenCode conversations instead of stopping at harness validation.

The collector reads OpenCode SQLite databases locally and in read-only mode. It prefers the active message/part representation and falls back to session_message per session. Transcript data remains local.

Review guide

Start with the OpenCode decoder in collect_sessions.py. Focus on schema selection, WAL-safe database access, and transcript normalization. The tests cover both schemas and their precedence.

What changed

• Added OpenCode harness detection and CLI options.
• Added default and explicit database discovery.
• Normalized messages, tool calls, errors, code edits, skill usage, and child sessions.
• Added bounded diagnostics for malformed data and unusable database paths.
• Added fixtures for schema precedence, fallback behavior, filtering, statistics, and live WAL reads.

Validation

• python3 -m unittest test_collect_sessions.py test_render_report.py — 23 tests passed.
• Python 3.9 test suite — 23 tests passed.
• py_compile passed on both Python versions.
• git diff --check passed.
• A read-only smoke test against OpenCode v1.18.25 found and sampled two scoreable repository sessions.

[warp-for-oss]

@jbendotnet

Every PR must be linked to a same-repo issue before Oz can review it.

This PR is linked to #86, but no linked issue is marked ready-to-implement yet. Only repository maintainers apply that label, so please wait for a maintainer to mark the issue. Once it is marked, push a new commit or comment /warp-agent-review to re-trigger review.

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[warp-for-oss]

@jbendotnet

Every PR must be linked to a same-repo issue before Oz can review it.

Next step: open or find a same-repo issue describing this change, then link it to this PR by adding Closes #123 to the PR description (or using the "Development" sidebar on GitHub). A maintainer will mark the issue ready-to-implement when it is ready. Once it is marked, comment /warp-agent-review to re-trigger review.

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[warp-factories]

Warp has completed this task.

[jbendotnet]

/warp-agent-review

[warp-for-oss]

@jbendotnet

Every PR must be linked to a same-repo issue before Oz can review it.

This PR is linked to #86, but no linked issue is marked ready-to-implement yet. Only repository maintainers apply that label, so please wait for a maintainer to mark the issue. Once it is marked, push a new commit or comment /warp-agent-review to re-trigger review.

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