ROX-33916: add devcontainer with Claude Code agent for autonomous collector development

.claude/settings.json

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+{
+  "permissions": {
+    "deny": [
+      "mcp__github__merge_pull_request",
+      "mcp__github__delete_file",
+      "mcp__github__fork_repository",
+      "mcp__github__create_repository",
+      "mcp__github__actions_run_trigger"
+    ]
+  }
+}

.claude/skills/dev-loop/SKILL.md

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+---
+name: dev-loop
+description: Full autonomous development loop — implement, build, test, commit, push, create PR, monitor CI, fix failures until green
+disable-model-invocation: true
+allowed-tools: Bash(cmake *), Bash(ctest *), Bash(nproc), Bash(git add *), Bash(git commit *), Bash(git diff *), Bash(git describe *), Bash(git branch *), Bash(git status), Bash(git log *), Bash(git rev-parse *), Bash(clang-format *), Bash(sleep *), Bash(date *), Read, Write, Edit, Glob, Grep, Agent
+---
+
+# Dev Loop
+
+Complete a development task end-to-end: implement, build, test, push, create PR, monitor CI, fix failures.
+Do NOT stop until CI is green or you are blocked.
+
+## Phase 1: Implement
+
+1. Read and understand the task from $ARGUMENTS
+2. Explore relevant code
+3. Implement the changes
+4. Build: `cmake -S . -B cmake-build -DCMAKE_BUILD_TYPE=Release -DCOLLECTOR_VERSION=$(git describe --tags --abbrev=10 --long) && cmake --build cmake-build -- -j$(nproc)`
+   - If build fails, fix and retry
+5. Test: `ctest --no-tests=error -V --test-dir cmake-build`
+   - If tests fail, fix and retry
+6. Format: `clang-format --style=file -i <changed .cpp/.h files>`
+7. Commit: `git add` changed files, `git commit` with a descriptive message
+
+## Phase 2: Push and create PR
+
+Use the GitHub MCP server to push files and create a PR.
+Do NOT use `git push` — it will fail (no SSH keys in this container).
+
+1. Get the current branch name and the list of changed files:
+   - `git branch --show-current` for the branch
+   - `git diff --name-only origin/HEAD..HEAD` for changed files
+2. Use the GitHub MCP `push_files` tool to push the changed files directly to
+   the remote branch. This creates a commit via the GitHub API using the file
+   contents from your local workspace — it does not sync git history.
+   - owner: stackrox, repo: collector, branch: <current branch>
+   - Read each changed file and include its content
+   - Provide a commit message
+3. Search for an open PR for this branch via GitHub MCP
+4. If no PR exists, create a draft PR via GitHub MCP
+
+## Phase 3: Monitor CI
+
+Loop until all checks pass or blocked (max 6 cycles, ~3 hours):
+
+1. Wait 10 minutes: `sleep 600`
+2. Check CI status via GitHub MCP (PR checks, workflow runs)
+3. Update PR body with an `## Agent Status` section:
+   ```
+   ## Agent Status
+   **Last updated:** <`date -u +"%Y-%m-%d %H:%M UTC"`>
+   **CI cycle:** N of 6
+   **Status:** PENDING | PASSED | FIXED | FLAKE | BLOCKED
+   **Details:** <one-line summary>
+   ```
+4. Evaluate:
+   - **All checks passed** → update PR body, report success, stop
+   - **Still running** → continue loop
+   - **Failed** →
+     - Get job logs via GitHub MCP
+     - Diagnose: build error, test assertion, lint, infra flake
+     - If fixable: fix → build → test → push changed files via MCP → continue
+     - If infra flake: note as FLAKE, continue
+     - If not fixable: update PR body, report BLOCKED, stop
+
+## Phase 4: Check PR comments
+
+Before each CI cycle, check if there are new PR review comments via GitHub MCP.
+If a reviewer left feedback:
+- Address the feedback (edit code, fix issues)
+- Build and test
+- Push changed files via MCP
+- Note in the Agent Status section what feedback was addressed
+
+## Completion
+
+Print summary:
+```
+STATUS: PASSED | BLOCKED | TIMEOUT
+Branch: <branch>
+PR: <url>
+Cycles: N
+Changes: <list of files modified>
+```

.claude/skills/task/SKILL.md

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+---
+name: task
+description: Implement a change — edit code, build, test, format, commit locally. No push.
+disable-model-invocation: true
+allowed-tools: Bash(cmake *), Bash(ctest *), Bash(nproc), Bash(git add *), Bash(git commit *), Bash(git diff *), Bash(git describe *), Bash(git branch *), Bash(git status), Bash(clang-format *), Read, Write, Edit, Glob, Grep, Agent
+---
+
+# Task
+
+Implement a change locally: edit, build, test, format, commit.
+Do NOT push or create PRs — use /watch-ci for that.
+
+## Steps
+
+1. Read and understand the task from $ARGUMENTS
+2. Explore relevant code in the repository
+3. Implement the changes
+4. Build:
+   - `cmake -S . -B cmake-build -DCMAKE_BUILD_TYPE=Release -DCOLLECTOR_VERSION=$(git describe --tags --abbrev=10 --long) && cmake --build cmake-build -- -j$(nproc)`
+   - If build fails, fix and retry
+5. Run unit tests:
+   - `ctest --no-tests=error -V --test-dir cmake-build`
+   - If tests fail, fix and retry
+6. Format changed C++ files:
+   - `clang-format --style=file -i <changed .cpp/.h files>`
+7. Commit:
+   - `git add` the changed files
+   - `git commit` with a descriptive message
+
+## STOP here. Report and wait.
+
+Print this summary and then STOP. Do not continue with any other actions.
+
+```
+TASK COMPLETE
+Branch: <current branch>
+Commit: <commit hash>
+Files changed: <list>
+Tests: <pass/fail count>
+```
+
+The user will review and decide whether to run /watch-ci.
+Do NOT push, create branches, or create PRs.

.claude/skills/watch-ci/SKILL.md

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+---
+name: watch-ci
+description: Push files to existing remote branch via GitHub MCP, create PR if needed, monitor CI, fix failures until green
+disable-model-invocation: true
+allowed-tools: Bash(cmake *), Bash(ctest *), Bash(nproc), Bash(git add *), Bash(git commit *), Bash(git diff *), Bash(git describe *), Bash(git branch *), Bash(git status), Bash(git log *), Bash(git rev-parse *), Bash(clang-format *), Bash(sleep *), Bash(date *), Read, Write, Edit, Glob, Grep
+---
+
+# Watch CI
+
+Push changed files via the GitHub MCP server, create PR if needed, and monitor CI until green.
+Do NOT use `git push` — it will fail (no SSH keys in this container).
+
+## How pushing works
+
+Use the GitHub MCP `push_files` tool to send file contents directly to the remote
+branch via the GitHub API. This does NOT sync local git history — it creates a new
+commit on the remote with the file contents you provide.
+
+1. Get the branch name: `git branch --show-current`
+2. Get changed files: `git diff --name-only origin/HEAD..HEAD`
+3. Read each changed file's content
+4. Call `push_files` with owner: stackrox, repo: collector, branch, files, and commit message
+
+## Steps
+
+1. **Push** changed files:
+   - Use the GitHub MCP `push_files` tool as described above
+   - If no files have changed since last push, skip
+
+2. **Find or create PR**:
+   - Use the GitHub MCP server to search for an open PR for this branch
+   - If no PR exists, create a draft PR via the GitHub MCP server
+
+3. **Monitor CI loop** (repeat until all checks pass or blocked):
+   - Wait 10 minutes: `sleep 600`
+   - Use the GitHub MCP server to get PR check status and workflow runs
+   - Update PR body with an `## Agent Status` section:
+     ```
+     ## Agent Status
+     **Last updated:** <`date -u +"%Y-%m-%d %H:%M UTC"`>
+     **CI cycle:** N of 6
+     **Status:** PENDING | PASSED | FIXED | FLAKE | BLOCKED
+     **Details:** <one-line summary>
+     ```
+   - Evaluate:
+     - **All checks passed** → update PR body, report success and stop
+     - **Checks still running** → report progress, continue loop
+     - **Checks failed** →
+       - Get job logs via the GitHub MCP server
+       - Diagnose:
+         - Build failure: read error, fix code
+         - Unit test failure: read assertion, fix code
+         - Lint failure: run `clang-format --style=file -i`
+         - Integration test infra flake (VM timeout, network): report as flake, continue
+         - Integration test real failure: analyze and fix code
+       - If fixable: fix → build → test → push changed files via MCP → continue loop
+       - If not fixable: update PR body, report diagnosis and stop
+
+4. **Safety limits**:
+   - Maximum 6 CI cycles (about 3 hours of monitoring)
+   - If exceeded, update PR body and stop
+
+5. **Summary**: end with a status line:
+   - `PASSED` — all checks green
+   - `PENDING` — checks still running
+   - `FIXED` — failure diagnosed and fix pushed
+   - `FLAKE` — infra failure, not a code issue
+   - `BLOCKED` — failure requires human intervention

.devcontainer/Dockerfile

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+# Collector development container
+# Based on the collector-builder image which has all C++ dependencies pre-installed.
+# Adds Claude Code, Go, and developer tooling for agent-driven development.
+#
+# Build environment: CentOS Stream 10 with clang, llvm, cmake, grpc, protobuf,
+# libbpf, bpftool, and all other collector dependencies.
+
+ARG COLLECTOR_BUILDER_TAG=master
+FROM quay.io/stackrox-io/collector-builder:${COLLECTOR_BUILDER_TAG}
+
+# Install developer tooling not in the builder image
+# Note: git, findutils, which, openssh-clients already in builder
+# bubblewrap: Claude Code uses this for built-in command sandboxing
+RUN dnf install -y \
+        bubblewrap \
+        clang-tools-extra \
+        jq \
+        socat \
+        zsh \
+        procps-ng \
+        sudo \
+        python3-pip \
+        iptables \
+        ipset \
+    && dnf clean all
+
+# Determine architecture strings used by various download URLs
+# uname -m gives aarch64 or x86_64
+# Go uses arm64/amd64, ripgrep/fd use aarch64/x86_64
+RUN ARCH=$(uname -m) \
+    && GOARCH=$([ "$ARCH" = "aarch64" ] && echo "arm64" || echo "amd64") \
+    # Install Go
+    && curl -fsSL "https://go.dev/dl/go1.23.6.linux-${GOARCH}.tar.gz" | tar -C /usr/local -xzf - \
+    # Install ripgrep
+    && curl -fsSL "https://github.com/BurntSushi/ripgrep/releases/download/14.1.1/ripgrep-14.1.1-${ARCH}-unknown-linux-gnu.tar.gz" \
+       | tar -xzf - --strip-components=1 -C /usr/local/bin "ripgrep-14.1.1-${ARCH}-unknown-linux-gnu/rg" \
+    # Install fd
+    && curl -fsSL "https://github.com/sharkdp/fd/releases/download/v10.2.0/fd-v10.2.0-${ARCH}-unknown-linux-gnu.tar.gz" \
+       | tar -xzf - --strip-components=1 -C /usr/local/bin "fd-v10.2.0-${ARCH}-unknown-linux-gnu/fd"
+
+ENV PATH="/usr/local/go/bin:${PATH}"
+ENV GOPATH="/home/dev/go"
+ENV PATH="${GOPATH}/bin:${PATH}"
+
+# Install Node.js (needed for Claude Code)
+ARG NODE_VERSION=22
+RUN curl -fsSL https://rpm.nodesource.com/setup_${NODE_VERSION}.x | bash - \
+    && dnf install -y nodejs \
+    && dnf clean all
+
+# Install Claude Code
+RUN npm install -g @anthropic-ai/claude-code
+
+# Install gcloud CLI (for Vertex AI auth and GCP VM management)
+RUN curl -fsSL https://sdk.cloud.google.com > /tmp/install-gcloud.sh \
+    && bash /tmp/install-gcloud.sh --disable-prompts --install-dir=/opt \
+    && rm /tmp/install-gcloud.sh
+ENV PATH="/opt/google-cloud-sdk/bin:${PATH}"
+
+# Create non-root dev user with passwordless sudo
+RUN useradd -m -s /bin/zsh dev \
+    && echo "dev ALL=(ALL) NOPASSWD:ALL" >> /etc/sudoers.d/dev \
+    && mkdir -p /home/dev/.claude/debug /home/dev/.commandhistory \
+    && chown -R dev:dev /home/dev/.claude /home/dev/.commandhistory
+
+# Install ansible for VM-based testing (optional, lightweight)
+RUN pip3 install ansible-core
+
+# Firewall script for network isolation (optional, used with --dangerously-skip-permissions)
+COPY --chmod=755 init-firewall.sh /usr/local/bin/init-firewall.sh
+COPY --chmod=755 entrypoint.sh /usr/local/bin/entrypoint.sh
+
+USER dev
+WORKDIR /workspace
+
+# Persist shell history and Claude state across rebuilds (volumes in devcontainer.json)
+ENV HISTFILE=/home/dev/.commandhistory/.zsh_history
+
+ENV SHELL=/bin/zsh
+ENV DEVCONTAINER=true
+
+ENTRYPOINT ["/usr/local/bin/entrypoint.sh"]