Add opencode slash-command generation (engine 0.4.2)

[dzykovic]

Summary

• opencode adapter now also generates one slash command per source skill at .opencode/commands/<name>.md, mirroring Claude Code's skill-as-slash-command UX.
• Each command's description is copied verbatim from the source SKILL.md; the body delegates to opencode's skill tool and forwards $ARGUMENTS, so any flag from the skill's argument-hint reaches the skill script unchanged.
• Cleanup is marker-based (OPENCODE_GEN_MARKER) — re-sync only deletes files carrying the marker, so hand-authored commands in .opencode/commands/ survive.
• Engine bumped to 0.4.2.

Changes

• opencode.sh: new sync_opencode_commands() + wiring in sync_to_opencode(); header comment documents the new Commands output.
• VERSION → 0.4.2; CHANGELOG.md [0.4.2] entry.
• Docs: ADAPTERS.md (cleanup contract item 1 + adapter table), CONVENTIONS.md + INIT.md (.gitignore recommendation adds .opencode/commands/; bootstrap sync_version example → 0.4.2), README.md capability matrix (opencode skills row notes the generated /cmd).

Base / stacking

Targets feature/add-opencode-adapter (the opencode adapter base, not yet merged to main), so the diff is exactly the 0.4.2 slash-command change. Retarget to main if you'd rather ship the adapter + slash commands as a single PR.

Status

Change content already validated by syncing into a downstream project (vendored copy updated, validate clean). Remaining polish / example updates to finish after further testing.

[Copilot]

Pull request overview

This PR extends the opencode adapter to generate opencode slash-commands for each synced skill (mirroring the “skill-as-command” UX), while also bumping the engine version to 0.4.2 and updating docs/changelog to reflect the new ownership/cleanup contract for .opencode/commands/.

Changes:

• Add sync_opencode_commands() to generate .opencode/commands/<skill>.md per skill with marker-based cleanup.
• Wire command generation into sync_to_opencode() alongside the existing skills + subagent generation.
• Bump version to 0.4.2 and update README/docs/INIT/changelog to document the new behavior and .gitignore recommendations.

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
README.md	Updates capability matrix to note opencode-generated slash commands for skills.
intelligence/sync/scripts/VERSION	Bumps engine version to 0.4.2.
intelligence/sync/scripts/adapters/opencode.sh	Implements marker-protected .opencode/commands/ generation and wires it into sync.
intelligence/sync/INIT.md	Updates bootstrap version and .gitignore guidance to include .opencode/commands/.
intelligence/sync/docs/CONVENTIONS.md	Updates .gitignore conventions and explains marker-protected command cleanup behavior.
intelligence/sync/docs/ADAPTERS.md	Updates adapter cleanup contract and adapter reference table for new commands output.
CHANGELOG.md	Adds 0.4.2 release notes documenting the new opencode commands generation and cleanup marker.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.