agent-supply-chain

仓库: github/awesome-copilot
安装量: 511
排名: #4428

安装

npx skills add https://github.com/github/awesome-copilot --skill agent-supply-chain

Agent Supply Chain Integrity Generate and verify integrity manifests for AI agent plugins and tools. Detect tampering, enforce version pinning, and establish supply chain provenance. Overview Agent plugins and MCP servers have the same supply chain risks as npm packages or container images — except the ecosystem has no equivalent of npm provenance, Sigstore, or SLSA. This skill fills that gap. Plugin Directory → Hash All Files (SHA-256) → Generate INTEGRITY.json ↓ Later: Plugin Directory → Re-Hash Files → Compare Against INTEGRITY.json ↓ Match? VERIFIED : TAMPERED When to Use Before promoting a plugin from development to production During code review of plugin PRs As a CI step to verify no files were modified after review When auditing third-party agent tools or MCP servers Building a plugin marketplace with integrity requirements Pattern 1: Generate Integrity Manifest Create a deterministic INTEGRITY.json with SHA-256 hashes of all plugin files. import hashlib import json from datetime import datetime , timezone from pathlib import Path EXCLUDE_DIRS = { ".git" , "pycache" , "node_modules" , ".venv" , ".pytest_cache" } EXCLUDE_FILES = { ".DS_Store" , "Thumbs.db" , "INTEGRITY.json" } def hash_file ( path : Path ) -

str : """Compute SHA-256 hex digest of a file.""" h = hashlib . sha256 ( ) with open ( path , "rb" ) as f : for chunk in iter ( lambda : f . read ( 8192 ) , b"" ) : h . update ( chunk ) return h . hexdigest ( ) def generate_manifest ( plugin_dir : str ) -

dict : """Generate an integrity manifest for a plugin directory.""" root = Path ( plugin_dir ) files = { } for path in sorted ( root . rglob ( "*" ) ) : if not path . is_file ( ) : continue if path . name in EXCLUDE_FILES : continue if any ( part in EXCLUDE_DIRS for part in path . relative_to ( root ) . parts ) : continue rel = path . relative_to ( root ) . as_posix ( ) files [ rel ] = hash_file ( path )

Chain hash: SHA-256 of all file hashes concatenated in sorted order

chain

hashlib . sha256 ( ) for key in sorted ( files . keys ( ) ) : chain . update ( files [ key ] . encode ( "ascii" ) ) manifest = { "plugin_name" : root . name , "generated_at" : datetime . now ( timezone . utc ) . isoformat ( ) , "algorithm" : "sha256" , "file_count" : len ( files ) , "files" : files , "manifest_hash" : chain . hexdigest ( ) , } return manifest

Generate and save

manifest

generate_manifest ( "my-plugin/" ) Path ( "my-plugin/INTEGRITY.json" ) . write_text ( json . dumps ( manifest , indent = 2 ) + "\n" ) print ( f"Generated manifest: { manifest [ 'file_count' ] } files, " f"hash: { manifest [ 'manifest_hash' ] [ : 16] } ..." ) Output ( INTEGRITY.json ): { "plugin_name" : "my-plugin" , "generated_at" : "2026-04-01T03:00:00+00:00" , "algorithm" : "sha256" , "file_count" : 12 , "files" : { ".claude-plugin/plugin.json" : "a1b2c3d4..." , "README.md" : "e5f6a7b8..." , "skills/search/SKILL.md" : "c9d0e1f2..." , "agency.json" : "3a4b5c6d..." } , "manifest_hash" : "7e8f9a0b1c2d3e4f..." } Pattern 2: Verify Integrity Check that current files match the manifest.

Requires: hash_file() and generate_manifest() from Pattern 1 above

import json from pathlib import Path def verify_manifest ( plugin_dir : str ) -

tuple [ bool , list [ str ] ] : """Verify plugin files against INTEGRITY.json.""" root = Path ( plugin_dir ) manifest_path = root / "INTEGRITY.json" if not manifest_path . exists ( ) : return False , [ "INTEGRITY.json not found" ] manifest = json . loads ( manifest_path . read_text ( ) ) recorded = manifest . get ( "files" , { } ) errors = [ ]

Check recorded files

for rel_path , expected_hash in recorded . items ( ) : full = root / rel_path if not full . exists ( ) : errors . append ( f"MISSING: { rel_path } " ) continue actual = hash_file ( full ) if actual != expected_hash : errors . append ( f"MODIFIED: { rel_path } " )

Check for new untracked files

current

generate_manifest ( plugin_dir ) for rel_path in current [ "files" ] : if rel_path not in recorded : errors . append ( f"UNTRACKED: { rel_path } " ) return len ( errors ) == 0 , errors

Verify

passed , errors = verify_manifest ( "my-plugin/" ) if passed : print ( "VERIFIED: All files match manifest" ) else : print ( f"FAILED: { len ( errors ) } issue(s)" ) for e in errors : print ( f" { e } " ) Output on tampered plugin: FAILED: 3 issue(s) MODIFIED: skills/search/SKILL.md MISSING: agency.json UNTRACKED: backdoor.py Pattern 3: Dependency Version Audit Check that agent dependencies use pinned versions. import re def audit_versions ( config_path : str ) -

list [ dict ] : """Audit dependency version pinning in a config file.""" findings = [ ] path = Path ( config_path ) content = path . read_text ( ) if path . name == "package.json" : data = json . loads ( content ) for section in ( "dependencies" , "devDependencies" ) : for pkg , ver in data . get ( section , { } ) . items ( ) : if ver . startswith ( "^" ) or ver . startswith ( "~" ) or ver == "" or ver == "latest" : findings . append ( { "package" : pkg , "version" : ver , "severity" : "HIGH" if ver in ( "" , "latest" ) else "MEDIUM" , "fix" : f'Pin to exact: " { pkg } ": " { ver . lstrip ( "^~" ) } "' } ) elif path . name in ( "requirements.txt" , "pyproject.toml" ) : for line in content . splitlines ( ) : line = line . strip ( ) if ">=" in line and "<" not in line : findings . append ( { "package" : line . split ( ">=" ) [ 0 ] . strip ( ) , "version" : line , "severity" : "MEDIUM" , "fix" : f"Add upper bound: { line } ,<next_major" } ) return findings Pattern 4: Promotion Gate Use integrity verification as a gate before promoting plugins. def promotion_check ( plugin_dir : str ) -

dict : """Check if a plugin is ready for production promotion.""" checks = { }

1. Integrity manifest exists and verifies

passed , errors = verify_manifest ( plugin_dir ) checks [ "integrity" ] = { "passed" : passed , "errors" : errors }

2. Required files exist

root

Path ( plugin_dir ) required = [ "README.md" ] missing = [ f for f in required if not ( root / f ) . exists ( ) ]

Require at least one plugin manifest (supports both layouts)

manifest_paths

[ root / ".github/plugin/plugin.json" , root / ".claude-plugin/plugin.json" , ] if not any ( p . exists ( ) for p in manifest_paths ) : missing . append ( ".github/plugin/plugin.json (or .claude-plugin/plugin.json)" ) checks [ "required_files" ] = { "passed" : len ( missing ) == 0 , "missing" : missing }

3. No unpinned dependencies

mcp_path

root / ".mcp.json" if mcp_path . exists ( ) : config = json . loads ( mcp_path . read_text ( ) ) unpinned = [ ] for server in config . get ( "mcpServers" , { } ) . values ( ) : if isinstance ( server , dict ) : for arg in server . get ( "args" , [ ] ) : if isinstance ( arg , str ) and "@latest" in arg : unpinned . append ( arg ) checks [ "pinned_deps" ] = { "passed" : len ( unpinned ) == 0 , "unpinned" : unpinned }

Overall

all_passed

all ( c [ "passed" ] for c in checks . values ( ) ) return { "ready" : all_passed , "checks" : checks } result = promotion_check ( "my-plugin/" ) if result [ "ready" ] : print ( "Plugin is ready for production promotion" ) else : print ( "Plugin NOT ready:" ) for name , check in result [ "checks" ] . items ( ) : if not check [ "passed" ] : print ( f" FAILED: { name } " ) CI Integration Add to your GitHub Actions workflow: - name : Verify plugin integrity run : | PLUGIN_DIR="${{ matrix.plugin || '.' }}" cd "$PLUGIN_DIR" python -c " from pathlib import Path import json, hashlib, sys def hash_file(p) : h = hashlib.sha256() with open(p , 'rb') as f : for c in iter(lambda : f.read(8192) , b'') : h.update(c) return h.hexdigest() manifest = json.loads(Path('INTEGRITY.json').read_text()) errors = [ ] for rel , expected in manifest [ 'files' ] .items() : p = Path(rel) if not p.exists() : errors.append(f'MISSING : { rel } ') elif hash_file(p) != expected : errors.append(f'MODIFIED : { rel } ') if errors : for e in errors : print(f' : : error : : { e } ') sys.exit(1) print(f'Verified { len(manifest [ \"files\" ] ) } files') " Best Practices Practice Rationale Generate manifest after code review Ensures reviewed code matches production code Include manifest in the PR Reviewers can verify what was hashed Verify in CI before deploy Catches post-review modifications Chain hash for tamper evidence Single hash represents entire plugin state Exclude build artifacts Only hash source files — .git, pycache , node_modules excluded Pin all dependency versions Unpinned deps = different code on every install Related Resources OpenSSF SLSA — Supply-chain Levels for Software Artifacts npm Provenance — Sigstore-based package provenance Agent Governance Toolkit — Includes integrity verification and plugin signing OWASP ASI-09: Supply Chain Integrity

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