Issue comment workflow: Claude runs but doesn't post comments to issues

[AntoineMontane]

Description

When using claude-code-action with issue events (not PR events), Claude runs successfully and generates results, but comments are not posted back to the issue.

Workflow Configuration

name: claude-issue

on:
  issues:
    types: [opened, edited]
  issue_comment:
    types: [created, edited]

jobs:
  claude-issue:
    runs-on: ubuntu-latest
    if: github.actor \!= 'github-actions[bot]' && github.actor \!= 'claude[bot]'
    permissions:
      contents: write
      issues: write
      pull-requests: write
      id-token: write

    steps:
      - uses: actions/checkout@v4
      - uses: anthropics/claude-code-action@v1
        with:
          claude_code_oauth_token: ${{ secrets.CLAUDE_CODE_OAUTH_TOKEN }}
          prompt: |
            You are a feature assistant...
            [detailed prompt here]

Observed Behavior

1. Workflow triggers correctly on issue creation/comments
2. Claude runs and analyzes the codebase (visible in run logs)
3. Claude produces a result with analysis/recommendations
4. Result is NOT posted as a comment on the issue
5. Result only appears in the GitHub Actions run summary

Expected Behavior

Claude's response should be automatically posted as a comment on the issue, similar to how it works for PR reviews.

Logs

Run logs show:

• Auto-detected mode: agent for event: issue_comment
• Claude's result is captured in the output JSON
• No GitHub API calls to create comments visible

Tested Configurations

Tried various configurations:

• With/without trigger_phrase: ""
• With/without --allowedTools restrictions
• With @claude mention in comment

All result in the same behavior: Claude runs but doesn't post comments.

Environment

• claude-code-action version: v1 (latest)
• Runner: ubuntu-latest

Questions

1. Is comment posting on issues supported, or only for PRs?
2. Is there a specific configuration needed to enable comment posting?
3. Should this be filed as a bug or feature request?

[pelmered]

I have the same problem. Here is the output from the action:

{
  "type": "user",
  "message": {
    "role": "user",
    "content": "<my markdown response>"
  },
  "session_id": "<uuid>",
  "parent_tool_use_id": null,
  "uuid": "<uuid>",
  "isReplay": true
}
{
  "type": "result",
  "subtype": "success",
  "is_error": false,
  "duration_ms": 132818,
  "duration_api_ms": 144808,
  "num_turns": 3,
  "result": "<my markdown response>",
  "session_id": "<uuid>",
  "total_cost_usd": 0.66779625,
  "usage": {
    "input_tokens": 0,
    "cache_creation_input_tokens": 0,
    "cache_read_input_tokens": 0,
    "output_tokens": 0,
    "server_tool_use": {
      "web_search_requests": 0,
      "web_fetch_requests": 0
    },
    "service_tier": "standard",
    "cache_creation": {
      "ephemeral_1h_input_tokens": 0,
      "ephemeral_5m_input_tokens": 0
    }
  },
  "modelUsage": {
    "claude-haiku-4-5-20251001": {
      "inputTokens": 18321,
      "outputTokens": 516,
      "cacheReadInputTokens": 0,
      "cacheCreationInputTokens": 0,
      "webSearchRequests": 0,
      "costUSD": 0.020901000000000003,
      "contextWindow": 200000,
      "maxOutputTokens": 64000
    },
    "claude-opus-4-5-20251101": {
      "inputTokens": 122,
      "outputTokens": 6162,
      "cacheReadInputTokens": 465133,
      "cacheCreationInputTokens": 41547,
      "webSearchRequests": 0,
      "costUSD": 0.6468952499999999,
      "contextWindow": 200000,
      "maxOutputTokens": 64000
    }
  },
  "permission_denials": [],
  "uuid": "<uuid>"
}

[joejansen]

I have the same issue. In the past week I have had many instances of a Claude Code Github review action run complete, but no comment is ever posted. The action run succeeds, and I am billed for it, but there is no review comment added to the PR. It doesn't seem to be a config issue. The permissions and workflow all work most of the time. I used the claude code skill to set up the workflow and it has posted dozens of comments in the repo in question. This is an occasional failure.

{
  "type": "result",
  "subtype": "success",
  "is_error": false,
  "duration_ms": 299008,
  "num_turns": 17,
  "total_cost_usd": 2.3701759999999994,
  "permission_denials": [
    {
      "tool_name": "Bash",
      "tool_use_id": "toolu_012VNhjfeVVc37RA17be3SGF",
      "tool_input": {
        "command": "gh api repos/opentaxorg/pbc/pulls/318 --jq '.state, .draft, .comments'",
        "description": "Query PR #318 state and comment count via API"
      }
    },
    {
      "tool_name": "Bash",
      "tool_use_id": "toolu_01QwXuvbghGsad2ekw6FePyk",
      "tool_input": {
        "command": "find /home/runner/work/pbc/pbc/backend/tests -name \"*.py\" -type f -exec wc -l {} + | sort -rn | head -20",
        "description": "Check line counts of other test files to understand the pattern"
      }
    }
  ]
}

[lubc]

I'm having the same issue in my PRs. Claude runs successfully, generates the review, but the comment is never posted to the PR. It was working fine two days ago, and I didn't change anything in my config.

What I found:

• The run logs show "type": "result", "subtype": "success" with the review text in the result field
• The action logs "Successfully formatted Claude Code report"
• But then it goes straight to cleanup, no API call is made to post the comment

claude.yml:

name: Claude Code

on:
  issue_comment:
    types: [created]
  pull_request_review_comment:
    types: [created]
  issues:
    types: [opened, assigned]
  pull_request_review:
    types: [submitted]

jobs:
  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') || contains(github.event.issue.title, '@claude')))
    runs-on: ubuntu-latest
    permissions:
      contents: read
      pull-requests: write
      issues: read
      id-token: write
      actions: read # Required for Claude to read CI results on PRs
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          fetch-depth: 1

      - name: Run Claude Code
        id: claude
        uses: anthropics/claude-code-action@v1
        with:
          claude_code_oauth_token: ${{ secrets.CLAUDE_CODE_OAUTH_TOKEN }}

          # This is an optional setting that allows Claude to read CI results on PRs
          additional_permissions: |
            actions: read

[Kraxi]

I think I have the same problem, haven;t found this issue before
#944