Add llmchess to the mods registry - #1130

Adds llmchess: play chess against your session's model, or a built-in engine, in a pane beside the prompt while the agent works.

cmd mods add cmd-mod-llmchess -g

Entry

• name: llmchess, source and npm: cmd-mod-llmchess. Published as cmd-mod-llmchess@0.0.1 by vipulgupta2048; repo vipulgupta2048/token-chess, tag v0.0.1.
• kinds: command (/chess), renderer (the board in the feed on hosts without panes), hook (onSessionStart to resume a saved game)
• tags: game, chess, llm, pane

Review

Reviewed the published tarball cmd-mod-llmchess@0.0.1 (integrity sha512-tCrz/78hNPu+4gBhkcLp/Q7F1IvPMUTNVa6YXKxul3egdgJiQsLFc4RqWEOEwKk7cmGkEhqc5tl4F3xx3yJAiQ==, 17 files, no lifecycle scripts, no runtime dependencies), built from token-chess tag v0.0.1. cmd mods inspect on it reports: hooks onSessionStart; registers a slash command, feed renderer, event subscription and pane; reaches the filesystem; imports nothing. The mod also uses a pane, the Alt+C shortcut, the footer status and run_start/run_end events. The registry's kinds list has no values for those.

What it can reach:

• Model: one cmd.model.complete call per LLM move on the session's model, with no tools and no transcript, billed like any session request.
• Filesystem: reads and writes ~/.commandcode/llmchess/game.json to save the game.
• Nothing else: no network of its own, no child processes, no shell. A grep for child_process, spawn, exec(, fetch(, http and process.env across index.ts and src/ finds nothing in the published package.

No runtime dependencies. pnpm test passes 107/107, and pnpm typecheck is clean.

Validation

• mods/registry.schema.json (draft-07, ajv 8 with formats): OK.
• parseModsRegistry from packages/studio/app/lib/mods-registry.ts in the monorepo parses the updated file: 35 mods, no duplicate names, and llmchess resolves to cmd-mod-llmchess for both source and npm.
• The diff only appends this one entry. All other rows are untouched.