Forge is a hyphenated slash-command agent: it registers its commands as
`/speckit-<name>` (see `format_forge_command_name` and
`ForgeIntegration.build_command_invocation`), exactly like Cline.
`HookExecutor._render_hook_invocation` special-cases dollar-skills agents,
kimi, cline, and slash-skills agents, but had no Forge branch. Forge
matches none of those, so it fell through to `return f"/{command_id}"`
and rendered the DOTTED form — `/speckit.plan`, `/speckit.git.commit` —
which Forge does not recognize as a registered command.
Add a Forge branch mirroring the adjacent Cline branch, using
`format_forge_command_name` (idempotent, same contract as the Cline
formatter). Non-Forge agents are unaffected.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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