feat(web): harness bars for opencode, Grok, Muse and Antigravity, with brand icons, Muse's catalog and built-in skill rows

[GGGODLIN]

opencode, Grok Build, Muse Code and Antigravity panes get the harness bar; Grok and Muse panes wear their brand icon; a Muse pane gets an Agent palette; and five agents' palettes list their built-in skills. The bar's rows live in the catalog and the skill rows sit next to them, so the five commits ship together.

Commit	What it adds
feat(web) brand icons	Grok's mark is the two paths of grok.com/images/favicon.svg, rescaled to 24x24. Muse Code has no mark of its own: its product page at dev.meta.ai shows only Meta's, and its CLI prints only its name. It wears muse.ai's muse-logo.svg, the Muse family's mark, which dev.meta.ai links as Muse's site. Neither source states terms for using the mark; if you would rather not ship them, this commit leaves cleanly on its own
feat(web) Muse catalog	Twenty-three rows from Muse Code's docs (dev.meta.ai/docs/muse-code), checked against Muse 1.4.7's /help and slash completion. /new and /clear are dangerous, as in the other catalogs; /stop follows Codex's /stop and is not. Before, a Muse pane had no Agent palette
feat(web) harness bars	opencode: Model (/models), Compact, Resume (/sessions). Grok: Model, Compact, Resume. Muse: Model, Effort, Compact, Resume. Antigravity: Model, Compact, Resume, and its catalog gains /resume. Grok's and Antigravity's /model pickers also set the effort, and a bare /effort in Grok opens no picker, so neither has an Effort button
feat(web) built-in skills	Codex: five, spelled with the $ sigil Codex uses for a skill. opencode: /customize-opencode, which its own / menu hides. Grok: seventeen of its bundled skills, leaving out three it marks not user-invocable, imagine, which its /imagine command shadows, and review, which its completion showed only as /bundled:review. Antigravity: the three its default agent offers. Muse: its ten user-invocable bundled skills
test(commands)	The Muse skill test pins all ten rows; it named ten and checked seven

In the palette, a row with no argument is sent on tap, as Claude's /init is, and 17 of the new skill rows are such rows: Antigravity 3, Grok 8, Muse 6. On this branch's playground, Muse's /doctor was sent on tap and /resume-claude went into the composer with a trailing space. Not checked: what a bare tap of each of those 17 does mid-conversation, Antigravity's /plugin and Muse's /manage-settings in particular, and whether opencode's /customize-opencode, seen in its /skills picker, runs when typed as text.

The Grok, Muse and Antigravity bar buttons go through only with the reader fixes in #447, #448 and the Antigravity dialogs PR opened alongside this one. Without them the phone reads each agent's slash popup as a dialog, or the typed command as polluted, and refuses the send.

Change outline

web/src/components/agent-icon-data.ts   Grok's and Muse's marks
web/src/lib/agent-commands.ts           the Muse catalog, the bar's `// harness-bar` rows, agy's /resume, the skill rows
web/src/lib/harness-bar.ts              bars for opencode, grok, muse, agy and antigravity
web/src/lib/operator-scope.ts           muse joins AGENT_FAMILIES
docs/configure.md                       the bar table gains the four agents, and why some have no Effort button

Reviewer guide

• Start: web/src/lib/harness-bar.ts, the four new entries.
• Then: the MUSE catalog and the skill rows in web/src/lib/agent-commands.ts.
• Validate: harness-bar.test.ts, agent-commands.test.ts, harness-bar.test.tsx and actions-row.test.tsx.
• Focus: every bar command is a catalog row; a row with takesArg: false is sent on its first tap, so those 17 skill rows and /stop are the ones to read.

Validation beyond the suites

These ran on the fork build that carries these commits along with the fork's other changes, not on this branch over main alone, on 2026-10-15:

• The harness canary's bar scenario (feat(canary): a bar scenario that presses each harness-bar button, and Oh My Pi's paste chip in drafts #449), in a throwaway Herdr session, pressed each picker button through the phone's send path: opencode 1.18.34 2/2, Grok 1.0.52 2/2, Muse 1.4.8 3/3, Antigravity 1.3.5 2/2, each saved screen showing its picker. Before the reader fixes above, Grok, Muse and Antigravity failed it.
• Each skill row was seen in the agent's own completion: Codex 0.159.3's $ popup, opencode 1.18.34's /skills picker, the / completion of Grok 1.0.52, Antigravity 1.3.5 and Muse 1.4.8. The fork's palette puts every row in the composer rather than sending it, and there the staged text for each kind read back as a verifiable draft.
• On a phone against the fork build: Grok's bar, and Muse's Model and Effort.

Before and after, from the playground's PaneRouter in a PhoneFrame at 390 px with each agent's idle capture from the corpus, main on the left and this branch on the right. The bottom row is scrolled to where the bar sits. No bridge is running there, so the keys are inert. The last shot is Muse's palette, searched for resume.

Base branch — see CONTRIBUTING.md:

• Opened against main — there is one line of development, and main is it

Checks

• On this branch (macOS): bun run typecheck at the root and in web/ exited 0; bun run lint exited 0; bun test ./bridge ./cli ./scripts 8539 pass, 70 skip, 0 fail; cd web && bun run test 416 of 416 files, 26154 tests pass. With each commit's implementation taken out and only its tests left, over the commits before it on main 8629ecb: 2 failures for the icons, 2 for the Muse catalog, 5 for the bars, 5 for the skill rows; the last commit's test fails when /manage-settings leaves the catalog. Not run: cd web && bun run e2e, the Windows suites, and a live agent run on this branch over main alone.
• CHANGELOG: fork PR, so no entry. If lines help:
  • - **opencode, Grok Build, Muse Code and Antigravity panes get the harness bar.** Model, Compact and Resume, and Effort on Muse, above the keys.
  • - **Grok and Muse panes wear their brand icon.**
  • - **A Muse Code pane gets the Agent palette.** Its built-in commands, from Muse's own docs.
  • - **The Agent palette lists each agent's built-in skills.** Codex, opencode, Grok, Antigravity and Muse.