feat: ship inline chat to everyone

[Nikhil (shadowfax92)]

Summary

• Removes the alpha-feature requirement from the new tab home inline chat gate.
• Keeps NEWTAB_CHAT_SUPPORT as the BrowserOS compatibility boundary.
• Leaves capability loading and side panel fallback behavior unchanged.

Design

AgentCommandHome already owns the support boolean that feeds resolveHomeLlmRoutingMode. This change narrows that boolean to the real compatibility capability, so supported BrowserOS versions use inline chat without requiring alpha opt-in.

Test plan

• bun test apps/agent/screens/agent-command/home-compose.helpers.test.ts
• bun run lint
• bun run typecheck
• bun run test:main
• bun run check
• bun run build:agent

[Nikhil (shadowfax92)]

Greptile (@greptileai) review

[Nikhil (shadowfax92)]

Claude (@claude) review

[claude]

Claude finished Nikhil (@shadowfax92)'s task in 1m 37s —— View job

---

Code Review

• Gathering context
• Reading changed files
• Analyzing diff
• Providing review feedback

---

LGTM. This is a clean, minimal feature-ship change. Here's the breakdown:

What changed

AgentCommandHome.tsx:46 — supportsInlineChat used to require both ALPHA_FEATURES_SUPPORT (alpha opt-in flag) and NEWTAB_CHAT_SUPPORT (BrowserOS version gate). The alpha gate is now removed, leaving only the version boundary.

- const supportsInlineChat =
-   supports(Feature.ALPHA_FEATURES_SUPPORT) &&
-   supports(Feature.NEWTAB_CHAT_SUPPORT)
+ const supportsInlineChat = supports(Feature.NEWTAB_CHAT_SUPPORT)

Why it's correct

1. Right capability boundary. NEWTAB_CHAT_SUPPORT maps to minBrowserOSVersion: '0.40.0.0' in capabilities.ts:78. Users on older BrowserOS get supportsInlineChat = false, which causes resolveHomeLlmRoutingMode to return 'sidepanel' — the correct graceful fallback. No hard failure path.

2. No dead code introduced. Feature.ALPHA_FEATURES_SUPPORT remains active for other feature gates (ToolbarSettingsCard, etc.) — removing it from this one call site is clean.

3. Tests don't need to change. resolveHomeLlmRoutingMode already abstracts the routing decision from capability resolution — it just takes supportsInlineChat: boolean. All three routing modes (wait, inline-chat, sidepanel) are covered in the existing test suite; the new logic feeds the same boolean contract.

One thing worth confirming (non-blocking)

NEWTAB_CHAT_SUPPORT requires BrowserOS ≥ 0.40.0.0. Before this lands, it's worth a quick sanity-check that the 0.40.x cutoff represents an acceptable floor across the active install base — this is a product question, not a code issue, but good to have eyes on before shipping to everyone.

---

[github-actions]

✅ Tests passed — 1307/1311

Suite	Passed	Failed	Skipped
✅ agent	197/197	0	0
✅ build	18/18	0	0
✅ eval	91/91	0	0
✅ server-agent	301/301	0	0
✅ server-api	141/141	0	0
✅ server-browser	10/10	0	0
✅ server-integration	10/10	0	0
✅ server-lib	256/257	0	1
✅ server-root	47/50	0	3
✅ server-tools	236/236	0	0

View workflow run

[greptile-apps]

Greptile Summary

This PR removes the ALPHA_FEATURES_SUPPORT requirement from the new-tab home inline-chat gate, shipping the feature to all users on compatible BrowserOS versions (>= 0.40.0.0) without requiring an alpha opt-in.

• supportsInlineChat now resolves solely from supports(Feature.NEWTAB_CHAT_SUPPORT), dropping the alpha conjunct; the routing logic in resolveHomeLlmRoutingMode and the side-panel fallback path are otherwise unchanged.
• ALPHA_FEATURES_SUPPORT remains defined in the Feature enum and is still used in other parts of the codebase, so no dead code is introduced by this change.

Confidence Score: 5/5

Safe to merge — a one-line removal of an alpha flag conjunct with no changes to routing logic, side-panel fallback, or capability loading.

The diff removes a single boolean condition. The remaining gate (NEWTAB_CHAT_SUPPORT, gated to BrowserOS >= 0.40.0.0) is already tested and in production for the alpha cohort. Side-panel fallback for older BrowserOS versions is preserved, and ALPHA_FEATURES_SUPPORT continues to function correctly in all other feature contexts.

No files require special attention.

Important Files Changed

Filename	Overview
packages/browseros-agent/apps/agent/screens/agent-command/AgentCommandHome.tsx	Removes ALPHA_FEATURES_SUPPORT from the supportsInlineChat gate, leaving only the NEWTAB_CHAT_SUPPORT version check (BrowserOS >= 0.40.0.0); logic is correct and minimal.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[User submits prompt] --> B{capabilitiesLoading?}
    B -- yes --> W[mode: wait\ndisable submit]
    B -- no --> C{supports NEWTAB_CHAT_SUPPORT?\nBrowserOS >= 0.40.0.0}
    C -- yes --> D[mode: inline-chat\nnavigate to /home/chat]
    C -- no --> E[mode: sidepanel\nopenSidePanelWithSearch]

    style W fill:#fbbf24,color:#000
    style D fill:#34d399,color:#000
    style E fill:#60a5fa,color:#000

Loading

%%{init: {'theme': 'base', 'themeVariables': {"darkMode": true, "background": "#0d1117", "primaryColor": "#21262d", "primaryTextColor": "#e6edf3", "primaryBorderColor": "#8b949e", "lineColor": "#8b949e", "textColor": "#e6edf3", "edgeLabelBackground": "#161b22", "actorBkg": "#21262d", "actorBorder": "#8b949e", "actorTextColor": "#e6edf3", "actorLineColor": "#8b949e", "signalColor": "#8b949e", "signalTextColor": "#e6edf3", "noteBkgColor": "#373320", "noteBorderColor": "#d4a72c", "noteTextColor": "#f0e6c0", "labelBoxBkgColor": "#21262d", "labelBoxBorderColor": "#8b949e", "labelTextColor": "#e6edf3", "loopTextColor": "#e6edf3", "activationBkgColor": "#30363d", "activationBorderColor": "#8b949e"}}}%%
flowchart TD
    A[User submits prompt] --> B{capabilitiesLoading?}
    B -- yes --> W[mode: wait\ndisable submit]
    B -- no --> C{supports NEWTAB_CHAT_SUPPORT?\nBrowserOS >= 0.40.0.0}
    C -- yes --> D[mode: inline-chat\nnavigate to /home/chat]
    C -- no --> E[mode: sidepanel\nopenSidePanelWithSearch]

    style W fill:#fbbf24,color:#000
    style D fill:#34d399,color:#000
    style E fill:#60a5fa,color:#000

Loading

_{Reviews (1): Last reviewed commit: "feat: ship inline chat to everyone" | Re-trigger Greptile}

[greptile-apps]

Greptile Summary

This PR ships the new-tab inline chat to all users by removing the ALPHA_FEATURES_SUPPORT guard that previously blocked it. The NEWTAB_CHAT_SUPPORT capability (BrowserOS ≥ 0.40.0.0) remains as the sole compatibility gate, so older browser versions still fall back to the side panel.

• Gate simplification: supportsInlineChat in AgentCommandHome drops the && with ALPHA_FEATURES_SUPPORT, making NEWTAB_CHAT_SUPPORT the only condition evaluated by resolveHomeLlmRoutingMode.
• No behavior change for unsupported versions: The resolveHomeLlmRoutingMode helper returns 'sidepanel' when the capability is absent, so the fallback path is unaffected.

Confidence Score: 5/5

Safe to merge — the change is a single boolean simplification with a clear, well-tested fallback path for unsupported BrowserOS versions.

The only modification is dropping the alpha-flag requirement from a capability check. The capability system and routing helpers are unchanged, and the side-panel fallback for users below BrowserOS 0.40.0.0 continues to work exactly as before.

No files require special attention.

Important Files Changed

Filename	Overview
packages/browseros-agent/apps/agent/screens/agent-command/AgentCommandHome.tsx	Removes ALPHA_FEATURES_SUPPORT from the supportsInlineChat guard, leaving NEWTAB_CHAT_SUPPORT as the sole gate; routing logic is unchanged.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[AgentCommandHome mounts] --> B{capabilitiesLoading?}
    B -- yes --> C[llmRoutingMode = 'wait']
    B -- no --> D{supports NEWTAB_CHAT_SUPPORT?}
    D -- yes --> E[llmRoutingMode = 'inline-chat']
    D -- no --> F[llmRoutingMode = 'sidepanel']
    E --> G[navigate to /home/chat]
    F --> H[openSidePanelWithSearch]

Loading

%%{init: {'theme': 'base', 'themeVariables': {"darkMode": true, "background": "#0d1117", "primaryColor": "#21262d", "primaryTextColor": "#e6edf3", "primaryBorderColor": "#8b949e", "lineColor": "#8b949e", "textColor": "#e6edf3", "edgeLabelBackground": "#161b22", "actorBkg": "#21262d", "actorBorder": "#8b949e", "actorTextColor": "#e6edf3", "actorLineColor": "#8b949e", "signalColor": "#8b949e", "signalTextColor": "#e6edf3", "noteBkgColor": "#373320", "noteBorderColor": "#d4a72c", "noteTextColor": "#f0e6c0", "labelBoxBkgColor": "#21262d", "labelBoxBorderColor": "#8b949e", "labelTextColor": "#e6edf3", "loopTextColor": "#e6edf3", "activationBkgColor": "#30363d", "activationBorderColor": "#8b949e"}}}%%
flowchart TD
    A[AgentCommandHome mounts] --> B{capabilitiesLoading?}
    B -- yes --> C[llmRoutingMode = 'wait']
    B -- no --> D{supports NEWTAB_CHAT_SUPPORT?}
    D -- yes --> E[llmRoutingMode = 'inline-chat']
    D -- no --> F[llmRoutingMode = 'sidepanel']
    E --> G[navigate to /home/chat]
    F --> H[openSidePanelWithSearch]

Loading

_{Reviews (2): Last reviewed commit: "feat: ship inline chat to everyone" | Re-trigger Greptile}