Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add agents/claudius-ars/bulwark/claude-codegit clone --depth 1 https://github.com/claudius-ars/bulwarkWhat it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00000 | $0.03840 |
| Opus 5 | $0.00000 | $0.01920 |
| Sonnet 5 | $0.00000 | $0.00768 |
| Haiku 4.5 | $0.00000 | $0.00384 |
Grade A, and why
claude-code scanned grade A with 2 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Reads agent configuration directorieslowAgent snooping
.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.
Edit Claude Code's MCP settings file (`~/.claude/config.json` or similar): Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
curl -L https://github.com/bulwark/bulwark/releases/download/latest/bulwark -o /usr/local/bin/bulwark How it starts
The opening of the file, as written. The whole thing — 636 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Claude Code Integration
Claude Code is Anthropic's official CLI for Claude, providing agentic capabilities for software development tasks. Bulwark integrates with Claude Code via the MCP (Model Context Protocol) to add governance, policy enforcement, and audit logging.
Overview
Bulwark provides Claude Code with:
- Policy enforcement: Control which tools Claude Code can use
- Credential management: Securely inject API keys and tokens
- Audit logging: Track all tool calls and decisions
- Content inspection: Scan for secrets, PII, and security issues
- Rate limiting: Control request rates and costs
- Governance metadata: Show policy decisions in Claude's UI
Architecture
Claude Code CLI
|
| (MCP stdio/JSON-RPC)
|
Bulwark MCP Gateway
|
| (Policy, Credentials, Audit, Content Inspection)
|
MCP Servers (filesystem, github, slack, etc.)
Claude Code connects to Bulwark's MCP gateway, which enforces policies and forwards approved requests to the actual MCP servers.
Configuration
1. Configure Bulwark MCP Gateway
Create or edit ~/.bulwark/bulwark.yaml:
mcp:
enabled: true
mode: gateway
# MCP servers to proxy
servers:
- name: filesystem
command: npx
args:
- "-y"
- "@modelcontextprotocol/server-filesystem"
- "/Users/alice/projects"
env:
NODE_ENV: production
- name: github
command: npx
args:
- "-y"
- "@modelcontextprotocol/server-github"
env:
GITHUB_PERSONAL_ACCESS_TOKEN: "{{ credential:github-token }}"
- name: slack
command: npx
args:
- "-y"
- "@modelcontextprotocol/server-slack"
env:
SLACK_BOT_TOKEN: "{{ credential:slack-token }}"
# Enable policy enforcement
policy:
enabled: true
policy_file: ~/.bulwark/policies.yaml
# Enable credential vault
vault:
enabled: true
vault_dir: ~/.bulwark/vault
# Enable audit logging
audit:
enabled: true
database_path: ~/.bulwark/audit/audit.db
# Enable content inspection
content_inspection:
enabled: true
scan_requests: true
scan_responses: true
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- yesterday First seen · 636 lines · 0 tokens per session scan A 1bf4316d98e2
claude-code is an agent published in the GitHub repository claudius-ars/bulwark (4 stars, last pushed 6mo ago), licensed Apache-2.0. It costs nothing until one of its globs matches a file; then it loads 3,840 tokens. A static security scan graded it A with 2 findings (reads agent configuration directories, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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