AI agent skill · by @mariadb-operator

Mariadb Operator Comment

Post a comment (or a formal PR review) to a GitHub issue or pull request in mariadb-operator/mariadb-operator. Use whenever the user wants to publish something to GitHub for this repo — "comment on issue #123", "post this as a PR comment", "leave a note on #456", "reply on the PR" — and especially when they want the output of the mariadb-operator-pr-review skill delivered to GitHub instead of just shown in chat, e.g. "review PR #1234 and post it as a comment" or "post the review results to the PR". Always confirms the exact comment text with the user before publishing — never posts autonomously.

Archived 2026-10-23 · Source updated 2026-10-05 · License: Apache-2.0. Check the original repository for the latest version.

SKILL.md instructions

# mariadb-operator Comment

Publish a comment or PR review to `mariadb-operator/mariadb-operator` (or another repo the user names). This
skill only handles *delivery* — if the content is a code review, run `mariadb-operator-pr-review` first (or use
its output if already produced in this conversation) and pass the result in here for formatting and posting.

## Never post without confirmation

**This is the one rule that matters more than anything else below.** Posting to GitHub is public, hard to
fully undo (edits and deletions leave an audit trail, and people may already have read a notification), and
visible to the whole team. Before calling any tool that actually publishes something:

1. Render the exact text you are about to post, in full — not a paraphrase or a summary of it.
2. State exactly where it's going: `owner/repo#number`, and whether it's a plain comment, a review comment, or
   a formal review (with its verdict, e.g. "Request changes").
3. Ask the user to confirm with `AskUserQuestion` (options like "Post it" / "Edit first" / "Cancel"). Treat
   silence, an ambiguous reply, or moving on to a different topic as "no" — do not post speculatively.
4. Only after an explicit go-ahead, call the posting tool or `gh` command.

If the user asks you to "just post it" up front, still show the rendered text and get one explicit confirmation
before the tool call — the instruction to post is not itself the confirmation of *what* gets posted, since you
may have formatted or summarized content since they last saw it.

## GitHub credentials

Whenever this skill calls GitHub — posting a comment or a formal review — pick the access method in this order,
falling through only when the previous one is unavailable:

1. **Project-scoped GitHub MCP tools** (names like `mcp__github-mariadb-operator__add_issue_comment`,
   `mcp__github-mariadb-operator__pull_request_review_write`,
   `mcp__github-mariadb-operator__add_comment_to_pending_review`). These may show up as deferred tools — if so,
   load their schema with `ToolSearch` (e.g.
   `ToolSearch({query: "select:mcp__github-mariadb-operator__add_issue_comment", max_results: 1})`) before
   calling them.
2. **`gh` CLI with the project-specific token**, if the `mariadb-operator` MCP server isn't connected. Use
   `GITHUB_MARIADB_OPERATOR_TOKEN` explicitly (`GH_TOKEN="$GITHUB_MARIADB_OPERATOR_TOKEN" gh ...`) rather than
   the ambient `gh auth` session.
3. **Generic GitHub MCP tools** (`mcp__github__*`), if neither of the above is available.
4. **`gh` CLI with default credentials** (plain `gh auth`, no explicit token) as the last resort, if none of the above work.

## Step 1 — Resolve the target

Default repo is `mariadb-operator/mariadb-operator` unless the user names another one. Get the issue/PR number
from the user's message or a pasted URL (`github.com/<owner>/<repo>/(issues|pull)/<n>`). If it's ambiguous
whether something is an issue or a PR, it usually doesn't matter for a plain comment (GitHub PRs are issues
under the hood, so the same comment endpoint works for both) — it only matters if you're posting a *formal PR
review* (Step 3), which requires an actual pull request.

## Step 2 — Assemble the comment body

Two common sources:

- **Direct ask**: the user gives you the text, or a short instruction to write one (e.g. "tell them the fix
  looks good but ask about the migration path"). Draft it in the tone of a maintainer comment: concise,
  specific, no filler.
- **From `mariadb-operator-pr-review` output**: if a structured review (verdict table + per-dimension
  findings) already exists in this conversation, or you're asked to produce one, its Markdown output format is
  already written to drop straight into a GitHub comment — use it close to verbatim rather than re-summarizing
  it into something vaguer. Do not silently drop findings to shorten it; if you trim, tell the user what you cut.

Keep the rendered body in Markdown exactly as it will appear on GitHub — this is what you show the user in
Step 4, and what you post in Step 5, so there should be no gap between the two.

## Step 3 — Pick plain comment vs. formal review

- **Plain comment** (default): one comment on the issue/PR timeline. Use this for a review delivered as a
  single consolidated write-up (the normal `mariadb-operator-pr-review` output), status updates, questions, or
  anything that isn't anchored to specific diff lines. Simpler, and simplicity is the right default here — only
  reach for a formal review when the findings genuinely need per-line anchoring.
- **Formal PR review with inline comments**: only when the user explicitly wants findings attached to their
  exact lines in the diff (e.g. "leave inline comments on each finding"), and each finding has a concrete
  `file:line`. This requires a pending review that inline comments are added to before submission — see Step 5.
  Don't reach for this by default; a single well-formatted comment covers the common case and is easier for the
  user to review before you post it.

## Step 4 — Show the user exactly what will be posted, then stop and ask

Render, verbatim:

```
Target: <owner>/<repo>#<number> (<issue|PR>)
Mode: <plain comment | formal review: VERDICT>

--- comment body ---
<full rendered Markdown>
--- end ---
```

Then call `AskUserQuestion` asking whether to post, edit, or cancel. Do not proceed past this point without an
explicit "post it" answer. This is the hard gate described above — nothing in Step 5 runs before it.

## Step 5 — Post

Pick the access method per the [GitHub credentials](#github-credentials) section, then post with it.

**Plain comment:**
- MCP (project-scoped or generic): `add_issue_comment` with `owner`, `repo`, `issue_number`, `body` — works for
  both issues and PRs.
- gh CLI with the project token:
  ```bash
  GH_TOKEN="$GITHUB_MARIADB_OPERATOR_TOKEN" gh issue comment <n> --repo mariadb-operator/mariadb-operator --body "<text>"
  # or for a PR:
  GH_TOKEN="$GITHUB_MARIADB_OPERATOR_TOKEN" gh pr comment <n> --repo mariadb-operator/mariadb-operator --body "<text>"
  ```
- gh CLI with default credentials (drop the `GH_TOKEN` override, rely on ambient `gh auth`):
  ```bash
  gh issue comment <n> --repo mariadb-operator/mariadb-operator --body "<text>"
  # or for a PR:
  gh pr comment <n> --repo mariadb-operator/mariadb-operator --body "<text>"
  ```
  For either gh CLI variant, pass the body via `--body-file` (write it to the scratchpad directory first)
  instead of `--body` when it's long or has quoting-sensitive characters — safer than fighting shell escaping.

**Formal review with inline comments:**
- MCP (project-scoped or generic): use `pull_request_review_write` to create a pending review,
  `add_comment_to_pending_review` once per finding (each needs `path`, `line`, and the finding's body), then
  submit the pending review with its overall verdict (comment / approve / request changes) via
  `pull_request_review_write`.
- There's no clean `gh` CLI equivalent for multi-inline-comment reviews — if no MCP server is available and the
  user wants inline comments, say so and offer the plain-comment fallback instead of improvising something
  fragile.

After posting, confirm back to the user with a link or reference to what was just published — don't just say
"done".

## What this skill does not do

- It does not decide *what* to say about a PR — that's `mariadb-operator-pr-review` (or the user's own words).
  This skill only formats and delivers.
- It does not edit or delete existing comments unless the user explicitly asks for that, and the same
  confirmation gate applies before any edit/delete too.