add schedule & workflow dispatch paths. Also make prepare logic conditional (#353)

* feat: add agent mode for automation scenarios

- Add agent mode that always triggers without checking for mentions
- Implement Mode interface with support for mode-specific tool configuration
- Add getAllowedTools() and getDisallowedTools() methods to Mode interface
- Simplify tests by combining related test cases
- Update documentation and examples to include agent mode
- Fix TypeScript imports to prevent circular dependencies

Agent mode is designed for automation and workflow_dispatch scenarios
where Claude should always run without requiring trigger phrases.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

* Minor update to readme (from @main to @beta)

* Since workflow_dispatch isn't in the base action, update the examples accordingly

* minor formatting issue

* Update to say beta instead of main

* Fix missed tracking comment to be false

* add schedule & workflow dispatch paths. Also make prepare logic conditional

* tests

* Add test workflow for workflow_dispatch functionality

* Update workflow to use correct branch reference

* remove test workflow dispatch file

* minor lint update

* update workflow dispatch agent example

* minor lint update

* refactor: simplify prepare logic with mode-specific implementations

* ensure tag mode can't work with workflow dispatch and schedule tasks

* simplify: remove workflow_dispatch/schedule from create-prompt

- Remove workflow_dispatch and schedule event handling from create-prompt
  since agent mode doesn't use the standard prompt generation flow
- Enforce mode compatibility at selection time in the registry instead
  of runtime validation in tag mode
- Add explanatory comment in agent mode about why prompt file is needed
- Update tests to reflect simplified event handling

This reduces code duplication and makes the separation between tag mode
(entity-based events) and agent mode (automation events) clearer.

* simplify PR by making agent mode only work with workflow dispatch and schedule events

* remove unnecessary changes

* remove unnecessary changes from PR

- Revert update-comment-link.ts changes (agent mode doesn't use this)
- Revert create-initial.ts changes (agent mode doesn't create comments)
- Remove unused default-branch.ts file
- Revert install-mcp-server.ts changes (agent mode uses minimal MCP)

These files are only used by tag mode for entity-based events, not needed
for workflow_dispatch/schedule support via agent mode.

* fix: handle optional entityNumber for TypeScript

- Add runtime checks in files that require entityNumber
- These files are only used by tag mode which always has entityNumber
- Agent mode (workflow_dispatch/schedule) doesn't use these files

* linting update

---------

Co-authored-by: km-anthropic <km-anthropic@users.noreply.github.com>
Co-authored-by: Claude <noreply@anthropic.com>

src/modes/agent/index.ts

@@ -1,30 +1,31 @@
-import type { Mode } from "../types";
+import * as core from "@actions/core";
+import { mkdir, writeFile } from "fs/promises";
+import type { Mode, ModeOptions, ModeResult } from "../types";
 
 /**
  * Agent mode implementation.
  *
- * This mode is designed for automation and workflow_dispatch scenarios.
- * It always triggers (no checking), allows highly flexible configurations,
- * and works well with override_prompt for custom workflows.
- *
- * In the future, this mode could restrict certain tools for safety in automation contexts,
- * e.g., disallowing WebSearch or limiting file system operations.
+ * This mode is specifically designed for automation events (workflow_dispatch and schedule).
+ * It bypasses the standard trigger checking and comment tracking used by tag mode,
+ * making it ideal for scheduled tasks and manual workflow runs.
  */
 export const agentMode: Mode = {
   name: "agent",
-  description: "Automation mode that always runs without trigger checking",
+  description: "Automation mode for workflow_dispatch and schedule events",
 
-  shouldTrigger() {
-    return true;
+  shouldTrigger(context) {
+    // Only trigger for automation events
+    return (
+      context.eventName === "workflow_dispatch" ||
+      context.eventName === "schedule"
+    );
   },
 
-  prepareContext(context, data) {
+  prepareContext(context) {
+    // Agent mode doesn't use comment tracking or branch management
     return {
       mode: "agent",
       githubContext: context,
-      commentId: data?.commentId,
-      baseBranch: data?.baseBranch,
-      claudeBranch: data?.claudeBranch,
     };
   },
 
@@ -39,4 +40,80 @@ export const agentMode: Mode = {
   shouldCreateTrackingComment() {
     return false;
   },
+
+  async prepare({ context }: ModeOptions): Promise<ModeResult> {
+    // Agent mode handles automation events (workflow_dispatch, schedule) only
+
+    // Create prompt directory
+    await mkdir(`${process.env.RUNNER_TEMP}/claude-prompts`, {
+      recursive: true,
+    });
+
+    // Write the prompt file - the base action requires a prompt_file parameter,
+    // so we must create this file even though agent mode typically uses
+    // override_prompt or direct_prompt. If neither is provided, we write
+    // a minimal prompt with just the repository information.
+    const promptContent =
+      context.inputs.overridePrompt ||
+      context.inputs.directPrompt ||
+      `Repository: ${context.repository.owner}/${context.repository.repo}`;
+
+    await writeFile(
+      `${process.env.RUNNER_TEMP}/claude-prompts/claude-prompt.txt`,
+      promptContent,
+    );
+
+    // Export tool environment variables for agent mode
+    const baseTools = [
+      "Edit",
+      "MultiEdit",
+      "Glob",
+      "Grep",
+      "LS",
+      "Read",
+      "Write",
+    ];
+
+    // Add user-specified tools
+    const allowedTools = [...baseTools, ...context.inputs.allowedTools];
+    const disallowedTools = [
+      "WebSearch",
+      "WebFetch",
+      ...context.inputs.disallowedTools,
+    ];
+
+    core.exportVariable("ALLOWED_TOOLS", allowedTools.join(","));
+    core.exportVariable("DISALLOWED_TOOLS", disallowedTools.join(","));
+
+    // Agent mode uses a minimal MCP configuration
+    // We don't need comment servers or PR-specific tools for automation
+    const mcpConfig: any = {
+      mcpServers: {},
+    };
+
+    // Add user-provided additional MCP config if any
+    const additionalMcpConfig = process.env.MCP_CONFIG || "";
+    if (additionalMcpConfig.trim()) {
+      try {
+        const additional = JSON.parse(additionalMcpConfig);
+        if (additional && typeof additional === "object") {
+          Object.assign(mcpConfig, additional);
+        }
+      } catch (error) {
+        core.warning(`Failed to parse additional MCP config: ${error}`);
+      }
+    }
+
+    core.setOutput("mcp_config", JSON.stringify(mcpConfig));
+
+    return {
+      commentId: undefined,
+      branchInfo: {
+        baseBranch: "",
+        currentBranch: "",
+        claudeBranch: undefined,
+      },
+      mcpConfig: JSON.stringify(mcpConfig),
+    };
+  },
 };