Pin GitHub Action dependencies to commit SHAs for security

Pin oven-sh/setup-bun and anthropics/claude-code-base-action to specific commit SHAs instead of version tags to ensure reproducible builds and improve supply chain security.

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

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

.github/workflows/claude.yml

@@ -1,4 +1,4 @@
-name: Claude
+name: Claude Code
 
 on:
   issue_comment:
@@ -11,12 +11,12 @@ on:
     types: [submitted]
 
 jobs:
-  claude-pr:
+  claude:
     if: |
       (github.event_name == 'issue_comment' && contains(github.event.comment.body, '@claude')) ||
       (github.event_name == 'pull_request_review_comment' && contains(github.event.comment.body, '@claude')) ||
       (github.event_name == 'pull_request_review' && contains(github.event.review.body, '@claude')) ||
-      (github.event_name == 'issues' && contains(github.event.issue.body, '@claude'))
+      (github.event_name == 'issues' && (contains(github.event.issue.body, '@claude') || contains(github.event.issue.title, '@claude')))
     runs-on: ubuntu-latest
     permissions:
       contents: read
@@ -29,10 +29,8 @@ jobs:
         with:
           fetch-depth: 1
 
-      - name: Run Claude PR Agent
-        uses: anthropics/claude-code-action@main
+      - name: Run Claude Code
+        id: claude
+        uses: anthropics/claude-code-action@beta
         with:
-          timeout_minutes: "60"
           anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
-          allowed_tools: "Bash(bun install),Bash(bun test:*),Bash(bun run format),Bash(bun typecheck)"
-          custom_instructions: "You have also been granted tools for editing files and running bun commands (install, run, test) for testing your changes."

README.md

@@ -1,3 +1,5 @@
+![Claude Code Action responding to a comment](https://github.com/user-attachments/assets/1d60c2e9-82ed-4ee5-b749-f9e021c85f4d)
+
 # Claude Code Action
 
 A general-purpose [Claude Code](https://claude.ai/code) action for GitHub PRs and issues that can answer questions and implement code changes. This action listens for a trigger phrase in comments and activates Claude act on the request. It supports multiple authentication methods including Anthropic direct API, Amazon Bedrock, and Google Vertex AI.
@@ -63,20 +65,21 @@ jobs:
 
 ## Inputs
 
-| Input                 | Description                                                                                                          | Required | Default                      |
-| --------------------- | -------------------------------------------------------------------------------------------------------------------- | -------- | ---------------------------- |
-| `anthropic_api_key`   | Anthropic API key (required for direct API, not needed for Bedrock/Vertex)                                           | No\*     | -                            |
-| `direct_prompt`       | Direct prompt for Claude to execute automatically without needing a trigger (for automated workflows)                | No       | -                            |
-| `timeout_minutes`     | Timeout in minutes for execution                                                                                     | No       | `30`                         |
-| `github_token`        | GitHub token for Claude to operate with. **Only include this if you're connecting a custom GitHub app of your own!** | No       | -                            |
-| `anthropic_model`     | Model to use (provider-specific format required for Bedrock/Vertex)                                                  | No       | `claude-3-7-sonnet-20250219` |
-| `use_bedrock`         | Use Amazon Bedrock with OIDC authentication instead of direct Anthropic API                                          | No       | `false`                      |
-| `use_vertex`          | Use Google Vertex AI with OIDC authentication instead of direct Anthropic API                                        | No       | `false`                      |
-| `allowed_tools`       | Additional tools for Claude to use (the base GitHub tools will always be included)                                   | No       | ""                           |
-| `disallowed_tools`    | Tools that Claude should never use                                                                                   | No       | ""                           |
-| `custom_instructions` | Additional custom instructions to include in the prompt for Claude                                                   | No       | ""                           |
-| `assignee_trigger`    | The assignee username that triggers the action (e.g. @claude). Only used for issue assignment                        | No       | -                            |
-| `trigger_phrase`      | The trigger phrase to look for in comments, issue/PR bodies, and issue titles                                        | No       | `@claude`                    |
+| Input                 | Description                                                                                                          | Required | Default   |
+| --------------------- | -------------------------------------------------------------------------------------------------------------------- | -------- | --------- |
+| `anthropic_api_key`   | Anthropic API key (required for direct API, not needed for Bedrock/Vertex)                                           | No\*     | -         |
+| `direct_prompt`       | Direct prompt for Claude to execute automatically without needing a trigger (for automated workflows)                | No       | -         |
+| `timeout_minutes`     | Timeout in minutes for execution                                                                                     | No       | `30`      |
+| `github_token`        | GitHub token for Claude to operate with. **Only include this if you're connecting a custom GitHub app of your own!** | No       | -         |
+| `model`               | Model to use (provider-specific format required for Bedrock/Vertex)                                                  | No       | -         |
+| `anthropic_model`     | **DEPRECATED**: Use `model` instead. Kept for backward compatibility.                                                | No       | -         |
+| `use_bedrock`         | Use Amazon Bedrock with OIDC authentication instead of direct Anthropic API                                          | No       | `false`   |
+| `use_vertex`          | Use Google Vertex AI with OIDC authentication instead of direct Anthropic API                                        | No       | `false`   |
+| `allowed_tools`       | Additional tools for Claude to use (the base GitHub tools will always be included)                                   | No       | ""        |
+| `disallowed_tools`    | Tools that Claude should never use                                                                                   | No       | ""        |
+| `custom_instructions` | Additional custom instructions to include in the prompt for Claude                                                   | No       | ""        |
+| `assignee_trigger`    | The assignee username that triggers the action (e.g. @claude). Only used for issue assignment                        | No       | -         |
+| `trigger_phrase`      | The trigger phrase to look for in comments, issue/PR bodies, and issue titles                                        | No       | `@claude` |
 
 \*Required when using direct Anthropic API (default and when not using Bedrock or Vertex)
 
@@ -255,7 +258,7 @@ Use a specific Claude model:
 ```yaml
 - uses: anthropics/claude-code-action@beta
   with:
-    anthropic_model: "claude-3-7-sonnet-20250219"
+    # model: "claude-3-5-sonnet-20241022"  # Optional: specify a different model
     # ... other inputs
 ```
 
@@ -283,21 +286,20 @@ Use provider-specific model names based on your chosen provider:
 # For direct Anthropic API (default)
 - uses: anthropics/claude-code-action@beta
   with:
-    anthropic_model: "claude-3-7-sonnet-20250219"
     anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
     # ... other inputs
 
 # For Amazon Bedrock with OIDC
 - uses: anthropics/claude-code-action@beta
   with:
-    anthropic_model: "anthropic.claude-3-7-sonnet-20250219-beta:0" # Cross-region inference
+    model: "anthropic.claude-3-7-sonnet-20250219-beta:0" # Cross-region inference
     use_bedrock: "true"
     # ... other inputs
 
 # For Google Vertex AI with OIDC
 - uses: anthropics/claude-code-action@beta
   with:
-    anthropic_model: "claude-3-7-sonnet@20250219"
+    model: "claude-3-7-sonnet@20250219"
     use_vertex: "true"
     # ... other inputs
 ```
@@ -323,7 +325,7 @@ Both AWS Bedrock and GCP Vertex AI require OIDC authentication.
 
 - uses: anthropics/claude-code-action@beta
   with:
-    anthropic_model: "anthropic.claude-3-7-sonnet-20250219-beta:0"
+    model: "anthropic.claude-3-7-sonnet-20250219-beta:0"
     use_bedrock: "true"
     # ... other inputs
 
@@ -348,7 +350,7 @@ Both AWS Bedrock and GCP Vertex AI require OIDC authentication.
 
 - uses: anthropics/claude-code-action@beta
   with:
-    anthropic_model: "claude-3-7-sonnet@20250219"
+    model: "claude-3-7-sonnet@20250219"
     use_vertex: "true"
     # ... other inputs
 

action.yml

@@ -14,10 +14,12 @@ inputs:
     required: false
 
   # Claude Code configuration
-  anthropic_model:
+  model:
     description: "Model to use (provider-specific format required for Bedrock/Vertex)"
     required: false
-    default: "claude-3-7-sonnet-20250219"
+  anthropic_model:
+    description: "DEPRECATED: Use 'model' instead. Model to use (provider-specific format required for Bedrock/Vertex)"
+    required: false
   allowed_tools:
     description: "Additional tools for Claude to use (the base GitHub tools will always be included)"
     required: false
@@ -65,7 +67,7 @@ runs:
   using: "composite"
   steps:
     - name: Install Bun
-      uses: oven-sh/setup-bun@v2
+      uses: oven-sh/setup-bun@735343b667d3e6f658f44d0eca948eb6282f2b76 # https://github.com/oven-sh/setup-bun/releases/tag/v2.0.2
       with:
         bun-version: 1.2.11
 
@@ -92,20 +94,20 @@ runs:
     - name: Run Claude Code
       id: claude-code
       if: steps.prepare.outputs.contains_trigger == 'true'
-      uses: anthropics/claude-code-base-action@beta
+      uses: anthropics/claude-code-base-action@5097b6cdfe5fc5a3ac0166cc344c34ed23c93982 # https://github.com/anthropics/claude-code-base-action/releases/tag/v0.0.5
       with:
         prompt_file: /tmp/claude-prompts/claude-prompt.txt
         allowed_tools: ${{ env.ALLOWED_TOOLS }}
         disallowed_tools: ${{ env.DISALLOWED_TOOLS }}
         timeout_minutes: ${{ inputs.timeout_minutes }}
-        anthropic_model: ${{ inputs.anthropic_model }}
+        model: ${{ inputs.model || inputs.anthropic_model }}
         mcp_config: ${{ steps.prepare.outputs.mcp_config }}
         use_bedrock: ${{ inputs.use_bedrock }}
         use_vertex: ${{ inputs.use_vertex }}
         anthropic_api_key: ${{ inputs.anthropic_api_key }}
       env:
         # Model configuration
-        ANTHROPIC_MODEL: ${{ inputs.anthropic_model }}
+        ANTHROPIC_MODEL: ${{ inputs.model || inputs.anthropic_model }}
         GITHUB_TOKEN: ${{ steps.prepare.outputs.GITHUB_TOKEN }}
 
         # AWS configuration

src/create-prompt/index.ts

@@ -434,9 +434,27 @@ ${
   eventData.eventName === "pull_request_review_comment"
     ? `<comment_tool_info>
 IMPORTANT: For this inline PR review comment, you have been provided with ONLY the mcp__github__update_pull_request_comment tool to update this specific review comment.
+
+Tool usage example for mcp__github__update_pull_request_comment:
+{
+  "owner": "${context.repository.split("/")[0]}",
+  "repo": "${context.repository.split("/")[1]}",
+  "commentId": ${eventData.commentId || context.claudeCommentId},
+  "body": "Your comment text here"
+}
+All four parameters (owner, repo, commentId, body) are required.
 </comment_tool_info>`
     : `<comment_tool_info>
 IMPORTANT: For this event type, you have been provided with ONLY the mcp__github__update_issue_comment tool to update comments.
+
+Tool usage example for mcp__github__update_issue_comment:
+{
+  "owner": "${context.repository.split("/")[0]}",
+  "repo": "${context.repository.split("/")[1]}",
+  "commentId": ${context.claudeCommentId},
+  "body": "Your comment text here"
+}
+All four parameters (owner, repo, commentId, body) are required.
 </comment_tool_info>`
 }
 
@@ -547,6 +565,9 @@ Important Notes:
 - Use this spinner HTML when work is in progress: <img src="https://github.com/user-attachments/assets/5ac382c7-e004-429b-8e35-7feb3e8f9c6f" width="14px" height="14px" style="vertical-align: middle; margin-left: 4px;" />
 ${eventData.isPR && !eventData.claudeBranch ? `- Always push to the existing branch when triggered on a PR.` : `- IMPORTANT: You are already on the correct branch (${eventData.claudeBranch || "the created branch"}). Never create new branches when triggered on issues or closed/merged PRs.`}
 - Use mcp__github_file_ops__commit_files for making commits (works for both new and existing files, single or multiple). Use mcp__github_file_ops__delete_files for deleting files (supports deleting single or multiple files atomically), or mcp__github__delete_file for deleting a single file. Edit files locally, and the tool will read the content from the same path on disk.
+  Tool usage examples:
+  - mcp__github_file_ops__commit_files: {"files": ["path/to/file1.js", "path/to/file2.py"], "message": "feat: add new feature"}
+  - mcp__github_file_ops__delete_files: {"files": ["path/to/old.js"], "message": "chore: remove deprecated file"}
 - Display the todo list as a checklist in the GitHub comment and mark things off as you go.
 - REPOSITORY SETUP INSTRUCTIONS: The repository's CLAUDE.md file(s) contain critical repo-specific setup instructions, development guidelines, and preferences. Always read and follow these files, particularly the root CLAUDE.md, as they provide essential context for working with the codebase effectively.
 - Use h3 headers (###) for section titles in your comments, not h1 headers (#).

src/github/token.ts

@@ -39,25 +39,19 @@ async function retryWithBackoff<T>(
     }
   }
 
-  throw new Error(
-    `Operation failed after ${maxAttempts} attempts. Last error: ${
-      lastError?.message ?? "Unknown error"
-    }`,
-  );
+  console.error(`Operation failed after ${maxAttempts} attempts`);
+  throw lastError;
 }
 
 async function getOidcToken(): Promise<string> {
   try {
     const oidcToken = await core.getIDToken("claude-code-github-action");
 
-    if (!oidcToken) {
-      throw new Error("OIDC token not found");
-    }
-
     return oidcToken;
   } catch (error) {
+    console.error("Failed to get OIDC token:", error);
     throw new Error(
-      `Failed to get OIDC token: ${error instanceof Error ? error.message : String(error)}`,
+      "Could not fetch an OIDC token. Did you remember to add `id-token: write` to your workflow permissions?",
     );
   }
 }
@@ -74,9 +68,15 @@ async function exchangeForAppToken(oidcToken: string): Promise<string> {
   );
 
   if (!response.ok) {
-    throw new Error(
-      `App token exchange failed: ${response.status} ${response.statusText}`,
+    const responseJson = (await response.json()) as {
+      error?: {
+        message?: string;
+      };
+    };
+    console.error(
+      `App token exchange failed: ${response.status} ${response.statusText} - ${responseJson?.error?.message ?? "Unknown error"}`,
     );
+    throw new Error(`${responseJson?.error?.message ?? "Unknown error"}`);
   }
 
   const appTokenData = (await response.json()) as {
@@ -117,7 +117,9 @@ export async function setupGitHubToken(): Promise<string> {
     core.setOutput("GITHUB_TOKEN", appToken);
     return appToken;
   } catch (error) {
-    core.setFailed(`Failed to setup GitHub token: ${error}`);
+    core.setFailed(
+      `Failed to setup GitHub token: ${error}.\n\nIf you instead wish to use this action with a custom GitHub token or custom GitHub app, provide a \`github_token\` in the \`uses\` section of the app in your workflow yml file.`,
+    );
     process.exit(1);
   }
 }

src/mcp/github-file-ops-server.ts

@@ -4,6 +4,7 @@ import { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
 import { StdioServerTransport } from "@modelcontextprotocol/sdk/server/stdio.js";
 import { z } from "zod";
 import { readFile } from "fs/promises";
+import { join } from "path";
 import fetch from "node-fetch";
 import { GITHUB_API_URL } from "../github/api/config";
 
@@ -36,6 +37,7 @@ type GitHubNewCommit = {
 const REPO_OWNER = process.env.REPO_OWNER;
 const REPO_NAME = process.env.REPO_NAME;
 const BRANCH_NAME = process.env.BRANCH_NAME;
+const REPO_DIR = process.env.REPO_DIR || process.cwd();
 
 if (!REPO_OWNER || !REPO_NAME || !BRANCH_NAME) {
   console.error(
@@ -71,18 +73,9 @@ server.tool(
         throw new Error("GITHUB_TOKEN environment variable is required");
       }
 
-      // Convert absolute paths to relative if they match CWD
-      const cwd = process.cwd();
       const processedFiles = files.map((filePath) => {
         if (filePath.startsWith("/")) {
-          if (filePath.startsWith(cwd)) {
-            // Strip CWD from absolute path
-            return filePath.slice(cwd.length + 1);
-          } else {
-            throw new Error(
-              `Path '${filePath}' must be relative to repository root or within current working directory`,
-            );
-          }
+          return filePath.slice(1);
         }
         return filePath;
       });
@@ -126,7 +119,11 @@ server.tool(
       // 3. Create tree entries for all files
       const treeEntries = await Promise.all(
         processedFiles.map(async (filePath) => {
-          const content = await readFile(filePath, "utf-8");
+          const fullPath = filePath.startsWith("/")
+            ? filePath
+            : join(REPO_DIR, filePath);
+
+          const content = await readFile(fullPath, "utf-8");
           return {
             path: filePath,
             mode: "100644",
@@ -232,13 +229,16 @@ server.tool(
         ],
       };
     } catch (error) {
+      const errorMessage =
+        error instanceof Error ? error.message : String(error);
       return {
         content: [
           {
             type: "text",
-            text: `Error: ${error instanceof Error ? error.message : String(error)}`,
+            text: `Error: ${errorMessage}`,
           },
         ],
+        error: errorMessage,
         isError: true,
       };
     }
@@ -423,13 +423,16 @@ server.tool(
         ],
       };
     } catch (error) {
+      const errorMessage =
+        error instanceof Error ? error.message : String(error);
       return {
         content: [
           {
             type: "text",
-            text: `Error: ${error instanceof Error ? error.message : String(error)}`,
+            text: `Error: ${errorMessage}`,
           },
         ],
+        error: errorMessage,
         isError: true,
       };
     }

src/mcp/install-mcp-server.ts

@@ -34,6 +34,7 @@ export async function prepareMcpConfig(
             REPO_OWNER: owner,
             REPO_NAME: repo,
             BRANCH_NAME: branch,
+            REPO_DIR: process.env.GITHUB_WORKSPACE || process.cwd(),
           },
         },
       },