io.github.anulum/synapse-channel

What we checked

Six static checks, weighted by risk. Every result reflects only what could be observed in the published package and repository — never intent.

• Injection surface

  unscannable25% of grade

  Tool descriptions/manifest scanned for instruction-injection patterns (imperatives at the model, hidden text, 'ignore previous', data-exfil URLs).

  No tool descriptions, server instructions, prompts, or resources were fetched; nothing to scan for injection.

• Supply chain

  pass25% of grade

  Package provenance: namespace verification, repo linkage, maintainer count, account age, postinstall scripts, typosquat distance.

  Python build script has no build-time network/exec; repository linkage verified

• Credential hygiene

  pass15% of grade

  How the server takes secrets (env vs plaintext config vs hardcoded); secrets appearing in tool schemas.

  Reads secrets from the environment (e.g. src/synapse_channel/agent_tmux.py) — the recommended intake shape. PASS = no static red flag; static analysis cannot prove the code honors env-based secret handling at runtime.

• Permission scope

  fail15% of grade

  Declared tools vs. breadth (filesystem, network, exec); flags shell-exec and unbounded filesystem access.

  HIGH: shell/exec capability AND network egress together — download-and-execute risk (src/synapse_channel/cli_cross_repo.py: subprocess.* call; src/synapse_channel/benchmark/probes.py: outbound HTTP/socket call). HIGH: shell/exec capability AND destructive filesystem writes together (src/synapse_channel/cli_cross_repo.py: subprocess.* call; src/synapse_channel/core/acl.py: path traversal ('../') combined with file access). discloses shell/exec capability: src/synapse_channel/cli_cross_repo.py: subprocess.* call discloses shell/exec capability: src/synapse_channel/cli_doctor.py: subprocess.* call discloses shell/exec capability: src/synapse_channel/client/diagnostics.py: subprocess.* call discloses shell/exec capability: src/synapse_channel/core/release_verification.py: subprocess.* call discloses shell/exec capability: src/synapse_channel/demo_runtime.py: subprocess.* call discloses shell/exec capability: src/synapse_channel/ergonomics.py: subprocess.* call discloses shell/exec capability: src/synapse_channel/git/attested_history.py: subprocess.* call discloses shell/exec capability: src/synapse_channel/git/gitclaim.py: subprocess.* call discloses shell/exec capability: src/synapse_channel/git/semantic_diff.py: subprocess.* call discloses dynamic code execution: src/synapse_channel/client/diagnostics.py: uses eval/exec/__import__ discloses broad/destructive filesystem access: src/synapse_channel/core/acl.py: path traversal ('../') combined with file access discloses broad/destructive filesystem access: src/synapse_channel/core/acl_enforcement.py: path traversal ('../') combined with file access discloses broad/destructive filesystem access: src/synapse_channel/core/aef_emission.py: destructive filesystem call (shutil.rmtree/os.remove/etc.) discloses broad/destructive filesystem access: src/synapse_channel/core/aef_replay_store.py: destructive filesystem call (shutil.rmtree/os.remove/etc.) discloses broad/destructive filesystem access: src/synapse_channel/core/archive_report.py: destructive filesystem call (shutil.rmtree/os.remove/etc.) discloses broad/destructive filesystem access: src/synapse_channel/core/channels.py: path traversal ('../') combined with file access discloses broad/destructive filesystem access: src/synapse_channel/core/identity.py: path traversal ('../') combined with file access discloses broad/destructive filesystem access: src/synapse_channel/core/identity_binding.py: path traversal ('../') combined with file access discloses broad/destructive filesystem access: src/synapse_channel/core/message_auth_durable.py: destructive filesystem call (shutil.rmtree/os.remove/etc.) discloses broad/destructive filesystem access: src/synapse_channel/core/persistence.py: destructive filesystem call (shutil.rmtree/os.remove/etc.) discloses broad/destructive filesystem access: src/synapse_channel/core/persistence_sqlcipher.py: destructive filesystem call (shutil.rmtree/os.remove/etc.) discloses broad/destructive filesystem access: src/synapse_channel/core/relay.py: destructive filesystem call (shutil.rmtree/os.remove/etc.) discloses broad/destructive filesystem access: src/synapse_channel/core/streaming.py: path traversal ('../') combined with file access Capability DISCLOSURE, not a verdict: static analysis sees the primitive is present and reachable, not whether its use is attacker-controlled.

• Version behavior

  fail10% of grade

  Diff of tool definitions between versions; new permissions or changed descriptions in a patch release (the postmark-mcp class).

  vs prior 0.99.2 (patch bump): new capability primitive(s) in source: child_process; new hardcoded outbound host/BCC destination(s): ide.example.

• Transport config

  warn10% of grade

  Remote servers: TLS and auth mode (none/token/OAuth). Local servers: whether the manifest indicates it phones home.

  manifest/source references telemetry behavior — disclosure