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/entrypoints/prepare.ts

@@ -7,17 +7,11 @@
 
 import * as core from "@actions/core";
 import { setupGitHubToken } from "../github/token";
-import { checkHumanActor } from "../github/validation/actor";
 import { checkWritePermissions } from "../github/validation/permissions";
-import { createInitialComment } from "../github/operations/comments/create-initial";
-import { setupBranch } from "../github/operations/branch";
-import { configureGitAuth } from "../github/operations/git-config";
-import { prepareMcpConfig } from "../mcp/install-mcp-server";
 import { createOctokit } from "../github/api/client";
-import { fetchGitHubData } from "../github/data/fetcher";
 import { parseGitHubContext } from "../github/context";
 import { getMode } from "../modes/registry";
-import { createPrompt } from "../create-prompt";
+import { prepare } from "../prepare";
 
 async function run() {
   try {
@@ -40,7 +34,7 @@ async function run() {
     }
 
     // Step 4: Get mode and check trigger conditions
-    const mode = getMode(context.inputs.mode);
+    const mode = getMode(context.inputs.mode, context);
     const containsTrigger = mode.shouldTrigger(context);
 
     // Set output for action.yml to check
@@ -51,65 +45,16 @@ async function run() {
       return;
     }
 
-    // Step 5: Check if actor is human
-    await checkHumanActor(octokit.rest, context);
-
-    // Step 6: Create initial tracking comment (mode-aware)
-    // Some modes (e.g., agent mode) may not need tracking comments
-    let commentId: number | undefined;
-    let commentData:
-      | Awaited<ReturnType<typeof createInitialComment>>
-      | undefined;
-    if (mode.shouldCreateTrackingComment()) {
-      commentData = await createInitialComment(octokit.rest, context);
-      commentId = commentData.id;
-    }
-
-    // Step 7: Fetch GitHub data (once for both branch setup and prompt creation)
-    const githubData = await fetchGitHubData({
-      octokits: octokit,
-      repository: `${context.repository.owner}/${context.repository.repo}`,
-      prNumber: context.entityNumber.toString(),
-      isPR: context.isPR,
-      triggerUsername: context.actor,
-    });
-
-    // Step 8: Setup branch
-    const branchInfo = await setupBranch(octokit, githubData, context);
-
-    // Step 9: Configure git authentication if not using commit signing
-    if (!context.inputs.useCommitSigning) {
-      try {
-        await configureGitAuth(githubToken, context, commentData?.user || null);
-      } catch (error) {
-        console.error("Failed to configure git authentication:", error);
-        throw error;
-      }
-    }
-
-    // Step 10: Create prompt file
-    const modeContext = mode.prepareContext(context, {
-      commentId,
-      baseBranch: branchInfo.baseBranch,
-      claudeBranch: branchInfo.claudeBranch,
-    });
-
-    await createPrompt(mode, modeContext, githubData, context);
-
-    // Step 11: Get MCP configuration
-    const additionalMcpConfig = process.env.MCP_CONFIG || "";
-    const mcpConfig = await prepareMcpConfig({
-      githubToken,
-      owner: context.repository.owner,
-      repo: context.repository.repo,
-      branch: branchInfo.claudeBranch || branchInfo.currentBranch,
-      baseBranch: branchInfo.baseBranch,
-      additionalMcpConfig,
-      claudeCommentId: commentId?.toString() || "",
-      allowedTools: context.inputs.allowedTools,
+    // Step 5: Use the new modular prepare function
+    const result = await prepare({
       context,
+      octokit,
+      mode,
+      githubToken,
     });
-    core.setOutput("mcp_config", mcpConfig);
+
+    // Set the MCP config output
+    core.setOutput("mcp_config", result.mcpConfig);
   } catch (error) {
     const errorMessage = error instanceof Error ? error.message : String(error);
     core.setFailed(`Prepare step failed with error: ${errorMessage}`);