feat(opencode): pass sessionID, model, and agent to tool.definition hook

[ualtinok]

Issue for this PR

Closes #17954
Supersedes #17334 / #17331

Type of change

• Bug fix
• New feature
• Refactor / code improvement
• Documentation

What does this PR do?

Passes sessionID through the tool registry so tool.definition plugin hooks can adapt tool descriptions based on session context.

Changes:

1. packages/opencode/src/tool/registry.ts — Refactored ToolRegistry.tools() from positional args (model, agent?) to a single input object { model, sessionID, agent? }. Added SessionID type import.

2. All call sites updated:

   • session/prompt.ts — threads session.id through
   • tool/batch.ts — threads ctx.sessionID through
   • cli/cmd/debug/agent.ts — creates session before fetching tools, passes session ID to both getAvailableTools and createToolContext
   • server/routes/experimental.ts — requires sessionID query param, validates session exists (404 if missing), added SessionID, NotFoundError, HTTPException imports

How did you verify your code works?

• Changes are structurally consistent with existing call patterns

Screenshots / recordings

Not a UI change.

Checklist

• I have tested my changes locally
• I have not included unrelated changes in this PR

[github-actions]

The following comment was made by an LLM, it may be inaccurate:

Based on my search, I found a related PR:

Related PR Found:

• feat(opencode): require session ids for tool definitions #17331 - "feat(opencode): require session ids for tool definitions" (feat(opencode): require session ids for tool definitions #17331)

Why it's related: This PR is explicitly mentioned in the current PR's description as being superseded by PR #17955. PR #17331 appears to address a similar concern about requiring session IDs for tool definitions, which is part of the broader refactoring in the current PR.

The current PR (#17955) is the newer implementation that builds upon and supersedes the earlier work in #17331 (and also #17334 as mentioned in the description).