ZhangJinChen
/
opencode


			
				
					
						
						
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    <main>
      <header>
        <div>
          <div class="eyebrow">opencode v2</div>
          <h1>API map</h1>
        </div>
        <div class="stack">
          <p class="lede">
            A single <code>/api</code> route surface for simple clients and multi-directory frontends. The important
            design question is not route nesting; it is where runtime context comes from.
          </p>
          <div class="key">
            <span class="pill">Server scoped</span>
            <span class="pill inverse">Request context</span>
            <span class="pill">Session pinned</span>
          </div>
        </div>
      </header>

      <section class="grid">
        <article class="span-8 rule">
          <strong>Everything has one canonical route. Some routes are server-scoped; runtime routes use context; session item routes use the session.</strong>
          <p>
            Server-scoped routes manage the whole server: projects, workspace lifecycle, and auth accounts. Runtime
            context is for anything resolved from an active directory, including config, provider capabilities, tools,
            files, and VCS.
          </p>
        </article>
        <nav class="span-4 panel panel-pad toc" aria-label="Page sections">
          <a href="#context"><strong>Context Model</strong><span>how calls resolve</span></a>
          <a href="#endpoints"><strong>Endpoint Inventory</strong><span>all planned routes</span></a>
          <a href="#events"><strong>Events</strong><span>one envelope</span></a>
          <a href="#store"><strong>Frontend Store</strong><span>sync model</span></a>
        </nav>
      </section>

      <section id="context" class="grid">
        <div class="span-12 stack">
          <h2>Context Model</h2>
          <svg class="diagram" viewBox="0 0 1280 360" role="img" aria-labelledby="ctx-title ctx-desc">
            <title id="ctx-title">API context resolution</title>
            <desc id="ctx-desc">Non-session routes resolve from request context, session item routes resolve from session storage.</desc>
            <defs>
              <marker id="arrow" markerWidth="10" markerHeight="10" refX="8" refY="3" orient="auto">
                <path d="M0,0 L0,6 L9,3 z" fill="#26342f" />
              </marker>
            </defs>

            <rect class="fill" x="34" y="44" width="294" height="96" />
            <text class="fill-text" x="58" y="84" font-size="24" font-weight="900">Non-session route</text>
            <text class="fill-text" x="58" y="116" font-size="17">/api/file, /api/vcs/status</text>
            <path class="line" d="M328 92 H472" />
            <rect class="box" x="486" y="44" width="286" height="96" />
            <text x="510" y="84" font-size="24" font-weight="900">Request context</text>
            <text x="510" y="116" font-size="17">query params or default runtime</text>
            <path class="line" d="M772 92 H916" />
            <rect class="box" x="930" y="44" width="316" height="96" />
            <text x="954" y="84" font-size="24" font-weight="900">Runtime context</text>
            <text x="954" y="116" font-size="17">directory + workspaceID?</text>

            <rect class="box" x="34" y="220" width="294" height="96" />
            <text x="58" y="260" font-size="24" font-weight="900">Session item route</text>
            <text x="58" y="292" font-size="17">/api/session/:id/prompt</text>
            <path class="line" d="M328 268 H472" />
            <rect class="fill" x="486" y="220" width="286" height="96" />
            <text class="fill-text" x="510" y="260" font-size="24" font-weight="900">Session row</text>
            <text class="fill-text" x="510" y="292" font-size="17">contains pinned context</text>
            <path class="line" d="M772 268 H916" />
            <rect class="box" x="930" y="220" width="316" height="96" />
            <text x="954" y="260" font-size="24" font-weight="900">Runtime context</text>
            <text x="954" y="292" font-size="17">directory + workspaceID?</text>
          </svg>
        </div>

        <article class="span-6 panel panel-pad stack">
          <h3>Request-context calls</h3>
          <p class="muted">
            These calls operate against a directory, optionally through a workspace. Simple clients omit context and
            use the default runtime.
          </p>
          <pre><code>GET /api/fs/tree?path=.&directory=/repo/app&workspace=ws_123</code></pre>
        </article>

        <article class="span-6 panel panel-pad stack">
          <h3>Session-pinned calls</h3>
          <p class="muted">
            These calls never take request context. The session is already pinned to the directory and workspace it was
            created in.
          </p>
          <pre><code>POST /api/session/ses_123/prompt

// server resolves
sessionID -&gt; { directory, workspaceID? }</code></pre>
        </article>
      </section>

      <section id="endpoints" class="grid">
        <div class="span-12 stack">
          <h2>Operation Inventory</h2>
          <p class="muted">
            The SDK is the source of truth. HTTP routes are mounts for RPC-style operations. <span class="context-tag server">server</span> operations do not use runtime context. <span class="context-tag request">request</span> operations use request/default runtime context from <code>directory</code> and <code>workspace</code> query parameters. <span class="context-tag session">session</span> operations use pinned session context and should not accept context input.
          </p>
        </div>

        <article class="span-12 panel panel-pad stack">
          <table>
            <thead><tr><th>Operation</th><th>Input</th><th>Context</th><th>HTTP mount</th><th>Purpose</th></tr></thead>
            <tbody>
              <tr><td class="operation"><code>agent.list</code></td><td class="body"><code>{}</code></td><td><span class="context-tag request">request</span></td><td class="route"><code>GET /api/agent</code></td><td>Available agents.</td></tr>
              <tr><td class="operation"><code>auth.activate</code></td><td class="body"><code>{ accountID: AccountID }</code></td><td><span class="context-tag server">server</span></td><td class="route"><code>POST /api/auth/:accountID/activate</code></td><td>Set the account as active for its service.</td></tr>
              <tr><td class="operation"><code>auth.create</code></td><td class="body"><code>{
  serviceID: ServiceID
  credential:
    | { type: "oauth", refresh: string, access: string, expires: number }
    | { type: "api", key: string, metadata?: Record&lt;string, string&gt; }
  description?: string
  active?: boolean
}</code></td><td><span class="context-tag server">server</span></td><td class="route"><code>POST /api/auth</code></td><td>Create an auth account.</td></tr>
              <tr><td class="operation"><code>auth.delete</code></td><td class="body"><code>{ accountID: AccountID }</code></td><td><span class="context-tag server">server</span></td><td class="route"><code>DELETE /api/auth/:accountID</code></td><td>Remove an auth account.</td></tr>
              <tr><td class="operation"><code>auth.get</code></td><td class="body"><code>{ accountID: AccountID }</code></td><td><span class="context-tag server">server</span></td><td class="route"><code>GET /api/auth/:accountID</code></td><td>Get one auth account.</td></tr>
              <tr><td class="operation"><code>auth.list</code></td><td class="body"><code>{ serviceID?: ServiceID }</code></td><td><span class="context-tag server">server</span></td><td class="route"><code>GET /api/auth</code></td><td>List saved auth accounts. Response includes active account mapping.</td></tr>
              <tr><td class="operation"><code>auth.update</code></td><td class="body"><code>{
  accountID: AccountID
  description?: string
  credential?:
    | { type: "oauth", refresh: string, access: string, expires: number }
    | { type: "api", key: string, metadata?: Record&lt;string, string&gt; }
}</code></td><td><span class="context-tag server">server</span></td><td class="route"><code>PATCH /api/auth/:accountID</code></td><td>Update account description or credential.</td></tr>
              <tr><td class="operation"><code>catalog.model.get</code></td><td class="body"><code>{
  providerID: ProviderID
  modelID: ModelID
}</code></td><td><span class="context-tag server">server</span></td><td class="route"><code>GET /api/catalog/model/:providerID/:modelID</code></td><td>Get one catalog model.</td></tr>
              <tr><td class="operation"><code>catalog.model.list</code></td><td class="body"><code>{}</code></td><td><span class="context-tag server">server</span></td><td class="route"><code>GET /api/catalog/model</code></td><td>List flattened catalog models.</td></tr>
              <tr><td class="operation"><code>command.list</code></td><td class="body"><code>{}</code></td><td><span class="context-tag request">request</span></td><td class="route"><code>GET /api/command</code></td><td>Available commands.</td></tr>
              <tr><td class="operation"><code>config.get</code></td><td class="body"><code>{}</code></td><td><span class="context-tag request">request</span></td><td class="route"><code>GET /api/config</code></td><td>Resolved config.</td></tr>
              <tr><td class="operation"><code>config.update</code></td><td class="body"><code>{ config: Config }</code></td><td><span class="context-tag request">request</span></td><td class="route"><code>PATCH /api/config</code></td><td>Update config.</td></tr>
              <tr><td class="operation"><code>event.subscribe</code></td><td class="body"><code>{}</code></td><td><span class="context-tag request">request</span></td><td class="route"><code>GET /api/event</code></td><td>Server-sent events for the resolved runtime context.</td></tr>
              <tr><td class="operation"><code>formatter.status</code></td><td class="body"><code>{}</code></td><td><span class="context-tag request">request</span></td><td class="route"><code>GET /api/formatter</code></td><td>Formatter status.</td></tr>
              <tr><td class="operation"><code>fs.file</code></td><td class="body"><code>{ path: string }</code></td><td><span class="context-tag request">request</span></td><td class="route"><code>GET /api/fs/file</code></td><td>Read one file.</td></tr>
              <tr><td class="operation"><code>fs.grep</code></td><td class="body"><code>{
  pattern: string
  include?: string
  limit?: number
}</code></td><td><span class="context-tag request">request</span></td><td class="route"><code>POST /api/fs/grep</code></td><td>Search file contents.</td></tr>
              <tr><td class="operation"><code>fs.search</code></td><td class="body"><code>{
  query: string
  type?: "file" | "directory"
  limit?: number
}</code></td><td><span class="context-tag request">request</span></td><td class="route"><code>POST /api/fs/search</code></td><td>Search paths by name.</td></tr>
              <tr><td class="operation"><code>fs.tree</code></td><td class="body"><code>{ path: string }</code></td><td><span class="context-tag request">request</span></td><td class="route"><code>GET /api/fs/tree</code></td><td>Browse a directory.</td></tr>
              <tr><td class="operation"><code>lsp.status</code></td><td class="body"><code>{}</code></td><td><span class="context-tag request">request</span></td><td class="route"><code>GET /api/lsp</code></td><td>LSP status.</td></tr>
              <tr><td class="operation"><code>mcp.prompt.list</code></td><td class="body"><code>{}</code></td><td><span class="context-tag request">request</span></td><td class="route"><code>GET /api/mcp/prompt</code></td><td>List MCP prompts.</td></tr>
              <tr><td class="operation"><code>mcp.prompt.render</code></td><td class="body"><code>{
  server: string
  name: string
  arguments?: Record&lt;string, string&gt;
}</code></td><td><span class="context-tag request">request</span></td><td class="route"><code>POST /api/mcp/prompt/render</code></td><td>Render one MCP prompt.</td></tr>
              <tr><td class="operation"><code>mcp.resource.list</code></td><td class="body"><code>{}</code></td><td><span class="context-tag request">request</span></td><td class="route"><code>GET /api/mcp/resource</code></td><td>List MCP resources.</td></tr>
              <tr><td class="operation"><code>mcp.resource.read</code></td><td class="body"><code>{
  server: string
  uri: string
}</code></td><td><span class="context-tag request">request</span></td><td class="route"><code>GET /api/mcp/resource/read</code></td><td>Read one MCP resource.</td></tr>
              <tr><td class="operation"><code>mcp.server.create</code></td><td class="body"><code>{
  name: string
  config:
    | { type: "local", command: string, arguments?: string[], environment?: Record&lt;string, string&gt; }
    | { type: "remote", url: string, headers?: Record&lt;string, string&gt;, oauth?: boolean | object }
}</code></td><td><span class="context-tag request">request</span></td><td class="route"><code>POST /api/mcp/server</code></td><td>Add an MCP server to runtime config.</td></tr>
              <tr><td class="operation"><code>mcp.server.list</code></td><td class="body"><code>{}</code></td><td><span class="context-tag request">request</span></td><td class="route"><code>GET /api/mcp/server</code></td><td>List MCP servers with status and auth state.</td></tr>
              <tr><td class="operation"><code>mcp.server.oauth.callback</code></td><td class="body"><code>{
  name: string
  code: string
}</code></td><td><span class="context-tag request">request</span></td><td class="route"><code>POST /api/mcp/server/:name/oauth/callback</code></td><td>Complete MCP OAuth.</td></tr>
              <tr><td class="operation"><code>mcp.server.oauth.delete</code></td><td class="body"><code>{ name: string }</code></td><td><span class="context-tag request">request</span></td><td class="route"><code>DELETE /api/mcp/server/:name/oauth</code></td><td>Remove MCP OAuth credentials.</td></tr>
              <tr><td class="operation"><code>mcp.server.oauth.start</code></td><td class="body"><code>{ name: string }</code></td><td><span class="context-tag request">request</span></td><td class="route"><code>POST /api/mcp/server/:name/oauth</code></td><td>Start MCP OAuth.</td></tr>
              <tr><td class="operation"><code>permission.list</code></td><td class="body"><code>{}</code></td><td><span class="context-tag request">request</span></td><td class="route"><code>GET /api/permission</code></td><td>Pending permission requests.</td></tr>
              <tr><td class="operation"><code>permission.reply</code></td><td class="body"><code>{
  permissionID: PermissionID
  response: PermissionReply
}</code></td><td><span class="context-tag request">request</span></td><td class="route"><code>POST /api/permission/:permissionID/reply</code></td><td>Reply to a permission request.</td></tr>
              <tr><td class="operation"><code>project.get</code></td><td class="body"><code>{ projectID: ProjectID }</code></td><td><span class="context-tag server">server</span></td><td class="route"><code>GET /api/project/:projectID</code></td><td>Get project metadata.</td></tr>
              <tr><td class="operation"><code>project.list</code></td><td class="body"><code>{}</code></td><td><span class="context-tag server">server</span></td><td class="route"><code>GET /api/project</code></td><td>List projects known to this server.</td></tr>
              <tr><td class="operation"><code>project.update</code></td><td class="body"><code>{
  projectID: ProjectID
  name?: string
  icon?: string
  commands?: Array&lt;{
    name: string
    command: string
  }&gt;
}</code></td><td><span class="context-tag server">server</span></td><td class="route"><code>PATCH /api/project/:projectID</code></td><td>Update project metadata.</td></tr>
              <tr><td class="operation"><code>provider.list</code></td><td class="body"><code>{}</code></td><td><span class="context-tag request">request</span></td><td class="route"><code>GET /api/provider</code></td><td>Provider inventory for the runtime context.</td></tr>
              <tr><td class="operation"><code>pty.create</code></td><td class="body"><code>{
  command?: string
  cwd?: string
  shell?: string
}</code></td><td><span class="context-tag request">request</span></td><td class="route"><code>POST /api/pty</code></td><td>Create PTY in the runtime context.</td></tr>
              <tr><td class="operation"><code>pty.delete</code></td><td class="body"><code>{ ptyID: PtyID }</code></td><td><span class="context-tag request">request</span></td><td class="route"><code>DELETE /api/pty/:ptyID</code></td><td>Delete PTY.</td></tr>
              <tr><td class="operation"><code>pty.get</code></td><td class="body"><code>{ ptyID: PtyID }</code></td><td><span class="context-tag request">request</span></td><td class="route"><code>GET /api/pty/:ptyID</code></td><td>Get PTY info.</td></tr>
              <tr><td class="operation"><code>pty.list</code></td><td class="body"><code>{}</code></td><td><span class="context-tag request">request</span></td><td class="route"><code>GET /api/pty</code></td><td>List PTYs for the runtime.</td></tr>
              <tr><td class="operation"><code>pty.update</code></td><td class="body"><code>{
  ptyID: PtyID
  title?: string
  size?: { columns: number, rows: number }
}</code></td><td><span class="context-tag request">request</span></td><td class="route"><code>PATCH /api/pty/:ptyID</code></td><td>Update PTY.</td></tr>
              <tr><td class="operation"><code>question.list</code></td><td class="body"><code>{}</code></td><td><span class="context-tag request">request</span></td><td class="route"><code>GET /api/question</code></td><td>Pending user questions.</td></tr>
              <tr><td class="operation"><code>question.reject</code></td><td class="body"><code>{ questionID: QuestionID }</code></td><td><span class="context-tag request">request</span></td><td class="route"><code>POST /api/question/:questionID/reject</code></td><td>Reject a question.</td></tr>
              <tr><td class="operation"><code>question.reply</code></td><td class="body"><code>{
  questionID: QuestionID
  response: QuestionResponse
}</code></td><td><span class="context-tag request">request</span></td><td class="route"><code>POST /api/question/:questionID/reply</code></td><td>Reply to a question.</td></tr>
              <tr><td class="operation"><code>session.compact</code></td><td class="body"><code>{ sessionID: SessionID }</code></td><td><span class="context-tag session">session</span></td><td class="route"><code>POST /api/session/:sessionID/compact</code></td><td>Compact the session conversation.</td></tr>
              <tr><td class="operation"><code>session.context</code></td><td class="body"><code>{ sessionID: SessionID }</code></td><td><span class="context-tag session">session</span></td><td class="route"><code>GET /api/session/:sessionID/context</code></td><td>Return active context messages after the last compaction.</td></tr>
              <tr><td class="operation"><code>session.create</code></td><td class="body"><code>{
  title?: string
  agent?: string
  model?: { providerID: ProviderID, modelID: ModelID }
  permission?: PermissionRule[]
}</code></td><td><span class="context-tag request">request</span></td><td class="route"><code>POST /api/session</code></td><td>Create a session pinned to resolved runtime context.</td></tr>
              <tr><td class="operation"><code>session.delete</code></td><td class="body"><code>{ sessionID: SessionID }</code></td><td><span class="context-tag session">session</span></td><td class="route"><code>DELETE /api/session/:sessionID</code></td><td>Delete a session.</td></tr>
              <tr><td class="operation"><code>session.diff</code></td><td class="body"><code>{ sessionID: SessionID }</code></td><td><span class="context-tag session">session</span></td><td class="route"><code>GET /api/session/:sessionID/diff</code></td><td>Return session diff summary.</td></tr>
              <tr><td class="operation"><code>session.get</code></td><td class="body"><code>{ sessionID: SessionID }</code></td><td><span class="context-tag session">session</span></td><td class="route"><code>GET /api/session/:sessionID</code></td><td>Get one session.</td></tr>
              <tr><td class="operation"><code>session.list</code></td><td class="body"><code>{
  limit?: number
  order?: "asc" | "desc"
  path?: string
  roots?: boolean
  start?: number
  search?: string
  cursor?: string
}</code></td><td><span class="context-tag request">request</span></td><td class="route"><code>GET /api/session</code></td><td>List sessions for the current runtime context by default.</td></tr>
              <tr><td class="operation"><code>session.message.list</code></td><td class="body"><code>{
  sessionID: SessionID
  limit?: number
  order?: "asc" | "desc"
  cursor?: string
}</code></td><td><span class="context-tag session">session</span></td><td class="route"><code>GET /api/session/:sessionID/message</code></td><td>Page through session messages.</td></tr>
              <tr><td class="operation"><code>session.prompt</code></td><td class="body"><code>{
  sessionID: SessionID
  prompt: Prompt
  delivery?: "immediate" | "deferred"
}</code></td><td><span class="context-tag session">session</span></td><td class="route"><code>POST /api/session/:sessionID/prompt</code></td><td>Create a user message and queue the agent loop.</td></tr>
              <tr><td class="operation"><code>session.todo</code></td><td class="body"><code>{ sessionID: SessionID }</code></td><td><span class="context-tag session">session</span></td><td class="route"><code>GET /api/session/:sessionID/todo</code></td><td>Return todos associated with the session.</td></tr>
              <tr><td class="operation"><code>session.update</code></td><td class="body"><code>{
  sessionID: SessionID
  title?: string
  archived?: number
  permission?: PermissionRule[]
}</code></td><td><span class="context-tag session">session</span></td><td class="route"><code>PATCH /api/session/:sessionID</code></td><td>Update title, archival state, or session metadata.</td></tr>
              <tr><td class="operation"><code>session.wait</code></td><td class="body"><code>{ sessionID: SessionID }</code></td><td><span class="context-tag session">session</span></td><td class="route"><code>POST /api/session/:sessionID/wait</code></td><td>Wait until the session is idle.</td></tr>
              <tr><td class="operation"><code>skill.list</code></td><td class="body"><code>{}</code></td><td><span class="context-tag request">request</span></td><td class="route"><code>GET /api/skill</code></td><td>Available skills.</td></tr>
              <tr><td class="operation"><code>vcs.diff</code></td><td class="body"><code>{
  format?: "json" | "patch"
  mode?: "worktree" | "default"
}</code></td><td><span class="context-tag request">request</span></td><td class="route"><code>GET /api/vcs/diff</code></td><td>Diff for the runtime directory.</td></tr>
              <tr><td class="operation"><code>vcs.get</code></td><td class="body"><code>{}</code></td><td><span class="context-tag request">request</span></td><td class="route"><code>GET /api/vcs</code></td><td>VCS metadata.</td></tr>
              <tr><td class="operation"><code>vcs.patch</code></td><td class="body"><code>{ patch: string }</code></td><td><span class="context-tag request">request</span></td><td class="route"><code>POST /api/vcs/patch</code></td><td>Apply a patch to the runtime directory.</td></tr>
              <tr><td class="operation"><code>vcs.status</code></td><td class="body"><code>{}</code></td><td><span class="context-tag request">request</span></td><td class="route"><code>GET /api/vcs/status</code></td><td>Changed files.</td></tr>
              <tr><td class="operation"><code>workspace.create</code></td><td class="body"><code>{
  projectID?: ProjectID
  name?: string
  directory?: string
  type: string
  metadata?: Record&lt;string, unknown&gt;
}</code></td><td><span class="context-tag server">server</span></td><td class="route"><code>POST /api/workspace</code></td><td>Create or register a workspace.</td></tr>
              <tr><td class="operation"><code>workspace.delete</code></td><td class="body"><code>{ workspaceID: WorkspaceID }</code></td><td><span class="context-tag server">server</span></td><td class="route"><code>DELETE /api/workspace/:workspaceID</code></td><td>Remove a workspace registration.</td></tr>
              <tr><td class="operation"><code>workspace.get</code></td><td class="body"><code>{ workspaceID: WorkspaceID }</code></td><td><span class="context-tag server">server</span></td><td class="route"><code>GET /api/workspace/:workspaceID</code></td><td>Get workspace metadata.</td></tr>
              <tr><td class="operation"><code>workspace.list</code></td><td class="body"><code>{ projectID?: ProjectID }</code></td><td><span class="context-tag server">server</span></td><td class="route"><code>GET /api/workspace</code></td><td>List workspaces, optionally filtered by project.</td></tr>
              <tr class="question-row"><td class="operation"><code>workspace.status</code></td><td class="body"><code>{}</code></td><td><span class="context-tag server">server</span></td><td class="route"><code>GET /api/workspace/status</code></td><td>Connection/lifecycle status for all workspaces. Needs team discussion.</td></tr>
              <tr class="question-row"><td class="operation"><code>workspace.sync</code></td><td class="body"><code>{}</code></td><td><span class="context-tag server">server</span></td><td class="route"><code>POST /api/workspace/sync</code></td><td>Sync workspace metadata from adapters. Needs team discussion.</td></tr>
              <tr><td class="operation"><code>workspace.update</code></td><td class="body"><code>{
  workspaceID: WorkspaceID
  name?: string
  metadata?: Record&lt;string, unknown&gt;
  archived?: boolean
}</code></td><td><span class="context-tag server">server</span></td><td class="route"><code>PATCH /api/workspace/:workspaceID</code></td><td>Update workspace metadata or lifecycle state.</td></tr>
              <tr class="question-row"><td class="operation"><code>workspace.warp</code></td><td class="body"><code>{
  workspaceID?: WorkspaceID
  sessionID: SessionID
  copyChanges: boolean
}</code></td><td><span class="context-tag server">server</span></td><td class="route"><code>POST /api/workspace/warp</code></td><td>Move a session into or out of a workspace. Needs team discussion.</td></tr>
            </tbody>
          </table>
        </article>
      </section>

      <section id="events" class="grid">
        <article class="span-12 panel panel-pad stack">
          <h2>Event Envelope</h2>
          <p class="muted">
            Every event uses the same envelope. Resource identity belongs in <code>payload</code>. Runtime identity belongs
            in <code>context</code>.
          </p>
          <div class="grid">
            <pre class="span-6"><code>type ApiEvent&lt;Payload&gt; = {
  id: string
  type: string
  time: number
  context: {
    directory: string
    workspaceID?: string
  }
  payload: Payload
}</code></pre>
            <pre class="span-6"><code>{
  "id": "evt_01",
  "type": "message.part.delta",
  "time": 1760000000000,
  "context": {
    "directory": "/repo/app",
    "workspaceID": "ws_123"
  },
  "payload": {
    "sessionID": "ses_123",
    "messageID": "msg_456",
    "partID": "part_789",
    "field": "text",
    "delta": "hello"
  }
}</code></pre>
          </div>
        </article>
      </section>

      <section id="store" class="grid">
        <article class="span-12 panel panel-pad stack">
          <h2>Frontend Sync Store</h2>
          <p class="muted">
            A frontend can keep one giant store like the current TUI. Runtime data is partitioned by
            <code>contextKey</code>. Durable entities such as sessions and messages are keyed by their own IDs.
          </p>
          <pre><code>type RuntimeContext = {
  directory: string
  workspaceID?: string
}

type ContextKey = string
type SessionID = string
type MessageID = string

type SyncStore = {
  status: "loading" | "partial" | "complete"

  shared: {
    provider: Provider[]
    provider_default: Record&lt;string, string&gt;
    provider_next: ProviderListResponse
    provider_auth: Record&lt;string, ProviderAuthMethod[]&gt;
    console_state: ConsoleState
  }

  contexts: Record&lt;
    ContextKey,
    {
      context: RuntimeContext

      config: Config
      agent: Agent[]
      command: Command[]
      lsp: LspStatus[]
      formatter: FormatterStatus[]
      vcs: VcsInfo | undefined
      mcp: Record&lt;string, McpStatus&gt;
      mcp_resource: Record&lt;string, McpResource&gt;

      session: SessionID[]
      session_status: Record&lt;SessionID, SessionStatus&gt;
    }
  &gt;

  session: Record&lt;SessionID, Session &amp; { context: RuntimeContext }&gt;
  session_diff: Record&lt;SessionID, Snapshot.FileDiff[]&gt;
  todo: Record&lt;SessionID, Todo[]&gt;
  permission: Record&lt;SessionID, PermissionRequest[]&gt;
  question: Record&lt;SessionID, QuestionRequest[]&gt;

  message: Record&lt;SessionID, Message[]&gt;
  part: Record&lt;MessageID, Part[]&gt;
}

function contextKey(context: RuntimeContext) {
  return `${context.workspaceID ?? "local"}:${context.directory}`
}</code></pre>
        </article>
      </section>
    </main>
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