Show profile and add OpenRouter fallback

action.yml

@@ -18,7 +18,7 @@ runs:
     # This step assumes this is `node:24-bookworm` container.
     - name: Install dependencies
       shell: bash
-      run: npm install -g @openai/codex @anthropic-ai/claude-code deno
+      run: npm install -g @openai/codex @anthropic-ai/claude-code opencode-ai deno
     # A local action lives inside the writable checkout. Execute a root-owned
     # copy so an agent changing this repository cannot replace a later phase.
     - name: Protect action source

profiles.yml

@@ -1,7 +1,10 @@
 reviewer-token: v1:XFUvCI9PnXVaW-ig:_3S9BvXywUp29cVYGA_EzFScKwC5oHkV9x2Ld8k-V_uiG7iA8n3fmjXCArzh2Lz-JDgy3IMTHoY
 profiles:
+  - type: codex
+    model: gpt-5.6-terra
   - type: claude
     model: claude-sonnet-5
     token: v1:-dyfF6ZicEhjPk4C:WCuMaGd09tYjtzUCl7abloRzPITvP5C35WpR372w3O_tcaD-ls-yV5sJBdU8iIVApZVCC98sY2gOyM3o9RMa8ciJq8Fuys7KxlYOp8QiluL9AYMSQi6rEsSH71EPWnxSACgo3uDQY8bWQpUlEZvXH9O-ZN9A58dh6b3vRg
-  - type: codex
-    model: gpt-5.6-terra
+  - type: opencode
+    model: openrouter/qwen/qwen3.8-27b
+    token: v1:4qdfJCdUx9jfiabC:8X0ic_J82lPlq_R3uTLaEbQy7UmEh7BgtG0bDKAcc8FeJ0xvEwkGCKaDoLmT5nta03hgjGdcWKjDdOSMi1kSDfp8J7tRTLtMRzDT8GX8OU_PVDPVahQIAU0

src/credentials.ts

@@ -4,6 +4,7 @@ import type { BotProfile } from "./profiles.ts";
 const DEFAULT_MODELS: Record<BotProfile["type"], string> = {
   claude: "claude-sonnet-5",
   codex: "gpt-5.6-terra",
+  opencode: "openrouter/qwen/qwen3.8-27b",
 };
 
 export type BotCredentials = {
@@ -110,13 +111,18 @@ export async function parseCredentials(
         }
       }
       const { type, model, token } = profile;
-      if (type !== "claude" && type !== "codex") {
-        throw new Error(`${at}.type: expected \"claude\" or \"codex\"`);
+      if (type !== "claude" && type !== "codex" && type !== "opencode") {
+        throw new Error(
+          `${at}.type: expected \"claude\", \"codex\", or \"opencode\"`,
+        );
       }
       if (model !== undefined && (typeof model !== "string" || model === "")) {
         throw new Error(`${at}.model: expected a model name`);
       }
-      if (type === "claude" && typeof token !== "string") {
+      if (
+        (type === "claude" || type === "opencode") &&
+        typeof token !== "string"
+      ) {
         throw new Error(`${at}.token: expected an encrypted credential`);
       }
       if (token !== undefined && typeof token !== "string") {

src/credentials_test.ts

@@ -46,22 +46,29 @@ Deno.test("decrypts the central reviewer token and ordered profiles", async () =
       `
 reviewer-token: ${ENCRYPTED}
 profiles:
-  - type: claude
-    token: ${ENCRYPTED}
   - type: codex
     model: gpt-custom
+  - type: claude
+    token: ${ENCRYPTED}
+  - type: opencode
+    token: ${ENCRYPTED}
 `,
       MASTER_KEY,
     ),
     {
       reviewerToken: "secret-token",
       profiles: [
+        { type: "codex", model: "gpt-custom" },
         {
           type: "claude",
           model: "claude-sonnet-5",
           token: "secret-token",
         },
-        { type: "codex", model: "gpt-custom" },
+        {
+          type: "opencode",
+          model: "openrouter/qwen/qwen3.8-27b",
+          token: "secret-token",
+        },
       ],
     },
   );

src/opencode.ts

@@ -0,0 +1,26 @@
+export function openCodeArgs(model: string, prompt: string): string[] {
+  return [
+    "run",
+    "--format",
+    "json",
+    "--auto",
+    "--model",
+    model,
+    prompt,
+  ];
+}
+
+export function parseOpenCodeEvents(output: string): string {
+  let result: string | undefined;
+  for (const line of output.split("\n")) {
+    if (line.trim() === "") continue;
+    const event: unknown = JSON.parse(line);
+    if (typeof event !== "object" || event === null) continue;
+    const { type, part } = event as Record<string, unknown>;
+    if (type !== "text" || typeof part !== "object" || part === null) continue;
+    const text = (part as Record<string, unknown>).text;
+    if (typeof text === "string" && text.trim() !== "") result = text;
+  }
+  if (result === undefined) throw new Error("OpenCode produced no text output");
+  return result;
+}

src/opencode_test.ts

@@ -0,0 +1,40 @@
+import { assertEquals, assertRejects } from "jsr:@std/assert@1";
+import { openCodeArgs, parseOpenCodeEvents } from "./opencode.ts";
+
+Deno.test("builds a non-interactive auto-approved OpenCode command", () => {
+  assertEquals(
+    openCodeArgs("openrouter/qwen/qwen3.8-27b", "Review this"),
+    [
+      "run",
+      "--format",
+      "json",
+      "--auto",
+      "--model",
+      "openrouter/qwen/qwen3.8-27b",
+      "Review this",
+    ],
+  );
+});
+
+Deno.test("returns the final visible OpenCode text event", () => {
+  assertEquals(
+    parseOpenCodeEvents([
+      JSON.stringify({ type: "step_start", part: { type: "step-start" } }),
+      JSON.stringify({ type: "text", part: { type: "text", text: "draft" } }),
+      JSON.stringify({ type: "text", part: { type: "text", text: "done" } }),
+      JSON.stringify({ type: "step_finish", part: { type: "step-finish" } }),
+    ].join("\n")),
+    "done",
+  );
+});
+
+Deno.test("rejects a successful OpenCode run without visible text", async () => {
+  await assertRejects(
+    async () => {
+      parseOpenCodeEvents('{"type":"step_start"}');
+      await Promise.resolve();
+    },
+    Error,
+    "no text output",
+  );
+});

src/post.ts

@@ -4,6 +4,7 @@ import {
   type RuntimeManifest,
   type RuntimeOutcome,
 } from "./runtime.ts";
+import { withProfile } from "./profiles.ts";
 
 export type PostContext = {
   apiUrl: string;
@@ -61,15 +62,24 @@ async function readOutcome(path: string): Promise<RuntimeOutcome> {
   if (
     outcome.ok !== true || typeof outcome.body !== "string" ||
     typeof outcome.reviewPath !== "string" ||
-    typeof outcome.anchorsPath !== "string"
+    typeof outcome.anchorsPath !== "string" ||
+    typeof outcome.profile !== "object" || outcome.profile === null
   ) {
     throw new Error("invalid agent outcome");
   }
+  const profile = outcome.profile as Record<string, unknown>;
+  if (typeof profile.type !== "string" || typeof profile.model !== "string") {
+    throw new Error("invalid agent outcome");
+  }
   return {
     ok: true,
     body: outcome.body,
     reviewPath: outcome.reviewPath,
     anchorsPath: outcome.anchorsPath,
+    profile: {
+      type: profile.type as "claude" | "codex" | "opencode",
+      model: profile.model,
+    },
   };
 }
 
@@ -131,11 +141,15 @@ export async function postRuntime(
     try {
       outcome = await readOutcome(manifest.outcomeFile);
     } catch (error) {
-      await postComment("AI bot failed.");
+      await postComment(
+        "AI bot failed.\n\n> Profile: none · all profiles failed",
+      );
       throw new Error("agent phase failed", { cause: error });
     }
     if (!outcome.ok) {
-      await postComment("AI bot failed.");
+      await postComment(
+        "AI bot failed.\n\n> Profile: none · all profiles failed",
+      );
       throw new Error("agent phase failed");
     }
 
@@ -148,7 +162,7 @@ export async function postRuntime(
       if (context.eventName === "pull_request") {
         throw new Error("agent did not write a pull request review");
       }
-      await postComment(outcome.body);
+      await postComment(withProfile(outcome.body, outcome.profile));
       return;
     }
 
@@ -166,11 +180,14 @@ export async function postRuntime(
       request(
         `repos/${context.repository}/pulls/${context.issueIndex}/reviews`,
         {
-          body: stripAnsi([`${mark} ${verdict.trim()}`, ...rest].join("\n")),
+          body: stripAnsi(withProfile(
+            [`${mark} ${verdict.trim()}`, ...rest].join("\n"),
+            outcome.profile,
+          )),
           event,
           comments: entries.map(({ path, line, side, body }) => ({
             path,
-            body: stripAnsi(body),
+            body: stripAnsi(withProfile(body, outcome.profile)),
             new_position: side === "new" ? line : 0,
             old_position: side === "old" ? line : 0,
           })),

src/post_test.ts

@@ -29,6 +29,7 @@ async function fixture(
   const outcome: RuntimeOutcome = source.ok
     ? {
       ...source,
+      profile: { type: "codex", model: "gpt-test" },
       reviewPath: `${profileHome}/review.md`,
       anchorsPath: `${profileHome}/anchors.json`,
     }
@@ -96,7 +97,9 @@ Deno.test("posts a successful issue result and removes runtime credentials", asy
     requests[0].url,
     `${context.apiUrl}/repos/owner/repo/issues/7/comments`,
   );
-  assertEquals(JSON.parse(String(requests[0].init?.body)), { body: "done" });
+  assertEquals(JSON.parse(String(requests[0].init?.body)), {
+    body: "done\n\n> Profile: `codex` · `gpt-test`",
+  });
   assertEquals(requests[0].init?.headers, {
     Authorization: "token reviewer-secret",
     "Content-Type": "application/json",
@@ -123,7 +126,15 @@ Deno.test("retries a rejected inline review without anchors", async () => {
   });
 
   assertEquals((bodies[0] as { comments: unknown[] }).comments.length, 1);
+  assertEquals(
+    (bodies[0] as { comments: Array<{ body: string }> }).comments[0].body,
+    "Finding\n\n> Profile: `codex` · `gpt-test`",
+  );
   assertEquals((bodies[1] as { comments: unknown[] }).comments, []);
+  assertEquals(
+    (bodies[1] as { body: string }).body,
+    "✅ Approved\nReady\n\n> Profile: `codex` · `gpt-test`",
+  );
   assert(await missing(result.runtimeDir));
 });
 
@@ -141,7 +152,9 @@ Deno.test("reports a generic agent failure and keeps the action failed", async (
     "agent phase failed",
   );
 
-  assertEquals(bodies, [{ body: "AI bot failed." }]);
+  assertEquals(bodies, [{
+    body: "AI bot failed.\n\n> Profile: none · all profiles failed",
+  }]);
   assert(!JSON.stringify(bodies).includes("reviewer-secret"));
   assert(await missing(result.runtimeDir));
 });
@@ -161,7 +174,9 @@ Deno.test("reports a generic failure when the runner wrote no outcome", async ()
     "agent phase failed",
   );
 
-  assertEquals(bodies, [{ body: "AI bot failed." }]);
+  assertEquals(bodies, [{
+    body: "AI bot failed.\n\n> Profile: none · all profiles failed",
+  }]);
   assert(await missing(result.runtimeDir));
 });
 

src/profiles.ts

@@ -1,9 +1,22 @@
 export type BotProfile = {
-  type: "claude" | "codex";
+  type: "claude" | "codex" | "opencode";
   model: string;
   token?: string;
 };
 
+export function profileFooter(
+  profile: Pick<BotProfile, "type" | "model">,
+): string {
+  return `> Profile: \`${profile.type}\` · \`${profile.model}\``;
+}
+
+export function withProfile(
+  body: string,
+  profile: Pick<BotProfile, "type" | "model">,
+): string {
+  return `${body}\n\n${profileFooter(profile)}`;
+}
+
 function isUsageExhausted(error: unknown): boolean {
   return /(?:usage|rate) limit|hit your (?:weekly )?limit|insufficient_quota|exceeded your current quota|too many requests|(?:api error|http error|http|status(?: code)?)[ :]+4(?:02|29)\b/i
     .test(String(error));
@@ -75,9 +88,12 @@ export function agentEnvironment(
   result.HOME = profile.home;
   if (profile.type === "codex") result.CODEX_HOME = `${profile.home}/.codex`;
   if (token) {
-    result[
-      profile.type === "claude" ? "CLAUDE_CODE_OAUTH_TOKEN" : "OPENAI_API_KEY"
-    ] = token;
+    const tokenName = {
+      claude: "CLAUDE_CODE_OAUTH_TOKEN",
+      codex: "OPENAI_API_KEY",
+      opencode: "OPENROUTER_API_KEY",
+    }[profile.type];
+    result[tokenName] = token;
   }
   return result;
 }

src/profiles_test.ts

@@ -1,10 +1,18 @@
 import { assertEquals, assertRejects } from "jsr:@std/assert@1";
 import {
   agentEnvironment,
+  profileFooter,
   runProfiles,
   sanitizedEnvironment,
 } from "./profiles.ts";
 
+Deno.test("formats profile attribution as a Markdown quote", () => {
+  assertEquals(
+    profileFooter({ type: "opencode", model: "openrouter/qwen/qwen3.8-27b" }),
+    "> Profile: `opencode` · `openrouter/qwen/qwen3.8-27b`",
+  );
+});
+
 Deno.test("falls through only after usage exhaustion", async () => {
   const visited: string[] = [];
   const result = await runProfiles(
@@ -158,3 +166,21 @@ Deno.test("uses a private Codex home without inventing an API credential", () =>
     CODEX_HOME: "/runtime/profile-1/.codex",
   });
 });
+
+Deno.test("exposes an OpenRouter key only to the OpenCode profile", () => {
+  const profile = {
+    index: 2,
+    type: "opencode" as const,
+    model: "openrouter/qwen/qwen3.8-27b",
+    uid: 20_002,
+    gid: 20_002,
+    home: "/runtime/profile-2",
+    tokenFile: "/runtime/profile-2/token",
+  };
+
+  assertEquals(agentEnvironment({ PATH: "/bin" }, profile, "selected"), {
+    PATH: "/bin",
+    HOME: "/runtime/profile-2",
+    OPENROUTER_API_KEY: "selected",
+  });
+});

src/run.ts

@@ -17,7 +17,9 @@ import {
   agentEnvironment,
   runProfiles,
   sanitizedEnvironment,
+  withProfile,
 } from "./profiles.ts";
+import { openCodeArgs, parseOpenCodeEvents } from "./opencode.ts";
 import {
   readRuntimeManifest,
   type RuntimeOutcome,
@@ -30,6 +32,7 @@ type AttemptResult = {
   body: string;
   reviewPath: string;
   anchorsPath: string;
+  profile: Pick<RuntimeProfile, "type" | "model">;
 };
 
 const env = (name: string): string => {
@@ -123,7 +126,7 @@ async function prepareProfile(
     ...SKILLS_INSTALL.split(" "),
     "--global",
     "--agent",
-    profile.type === "claude" ? "claude-code" : "codex",
+    profile.type === "claude" ? "claude-code" : profile.type,
     "--yes",
   ], token);
 }
@@ -253,7 +256,7 @@ async function codexDeviceLogin(
     ]);
     if (exited) throw new Error("AI bot login produced no instructions");
   }
-  await postAuthorComment(shown);
+  await postAuthorComment(withProfile(shown, profile));
   const [result] = await Promise.all([status, drained]);
   if (!result.success) {
     throw new Error(`codex login exited with ${result.code}`);
@@ -357,6 +360,30 @@ async function runCodex(
   return outputPath;
 }
 
+async function runOpenCode(
+  profile: RuntimeProfile,
+  token: string,
+  prompt: string,
+): Promise<string> {
+  const result = await agentCommand(
+    profile,
+    "opencode",
+    openCodeArgs(profile.model, prompt),
+    {
+      cwd: WORKSPACE,
+      env: agentEnvironment(PROCESS_ENV, profile, token),
+      clearEnv: true,
+      stdout: "piped",
+      stderr: "piped",
+    },
+  ).output();
+  const error = new TextDecoder().decode(result.stderr).trim();
+  if (!result.success) {
+    throw new Error(error || `opencode exited with ${result.code}`);
+  }
+  return parseOpenCodeEvents(new TextDecoder().decode(result.stdout));
+}
+
 async function runProfile(profile: RuntimeProfile): Promise<AttemptResult> {
   const token = await readProfileToken(profile);
   const authentication = profile.type === "codex"
@@ -382,8 +409,10 @@ async function runProfile(profile: RuntimeProfile): Promise<AttemptResult> {
     anchorsPath = rendered.anchorsPath;
     if (profile.type === "claude") {
       body = await runClaude(profile, token ?? "", rendered.prompt);
-    } else {
+    } else if (profile.type === "codex") {
       resultPath = await runCodex(profile, rendered.prompt, authentication!);
+    } else {
+      body = await runOpenCode(profile, token ?? "", rendered.prompt);
     }
   } finally {
     await killProfileProcesses(profile.uid);
@@ -397,7 +426,12 @@ async function runProfile(profile: RuntimeProfile): Promise<AttemptResult> {
   ) {
     throw new Error("agent attempt produced no result");
   }
-  return { body, reviewPath, anchorsPath };
+  return {
+    body,
+    reviewPath,
+    anchorsPath,
+    profile: { type: profile.type, model: profile.model },
+  };
 }
 
 async function writeOutcome(outcome: RuntimeOutcome): Promise<void> {

src/runtime.ts

@@ -26,6 +26,7 @@ export type RuntimeOutcome =
     body: string;
     reviewPath: string;
     anchorsPath: string;
+    profile: Pick<RuntimeProfile, "type" | "model">;
   }
   | { ok: false };
 

src/workflow_test.ts

@@ -163,3 +163,20 @@ Deno.test("uses the standard Skills installer without custom discovery", async (
     assert(error instanceof Deno.errors.NotFound);
   }
 });
+
+Deno.test("installs the OpenCode CLI", async () => {
+  const action = await Deno.readTextFile("action.yml");
+  assert(action.includes("opencode-ai"));
+});
+
+Deno.test("central profiles fall back from Codex to Claude to OpenCode", async () => {
+  const credentials = await yaml("profiles.yml");
+  const profiles = sequence(credentials.profiles, "profiles");
+  assertEquals(profiles.map((profile) => profile.type), [
+    "codex",
+    "claude",
+    "opencode",
+  ]);
+  assertEquals(profiles[2].model, "openrouter/qwen/qwen3.8-27b");
+  assert(String(profiles[2].token).startsWith("v1:"));
+});