forge

# forge — runtime tool factory for Claude Code You (Claude) can register a new tool at runtime via the `forge` MCP server. The new tool is callable as `mcp__forge__<name>` from the next `tools/list` onward, in the current session and in any future session that sees the same `~/.config/corvin-voice/forge/` workspace. When this plugin runs inside the voice-skill repo (the normal case), the cowork `forge` persona auto-routes user phrases like "forge mir ein tool", "build me a tool that …", or "I need a deterministic tool" onto this MCP server — the persona ships restrictively (no Bash/Edit/Write) so generated tools cannot inherit the owner's bypassPermissions privilege. ## When to use forge Reach for `forge_tool` when **at least one** of these holds: - You would otherwise write the same Bash/Python snippet ≥3 times with different parameters (paths, columns, thresholds) - You need precise numerical results over a dataset (statistics, regression, aggregation, filtering, splitting) - The user wants the answer **written to a file** (CSV, JSON, PNG) - The user uses the words *"deterministic"*, *"reproducible"*, *"save as"*, *"compute exactly"*, *"audit trail"* - The result of one computation is used multiple times later — caching it in a forged tool gets you reuse for free ## When NOT to use forge - One-off shell commands (`wc -l`, `git status`) — Bash is fine - LLM-shaped work (code review, translation, design discussion) - An existing forged tool already does this — ...