8d01a2a09c
Two defenses against GLOBAL-scope agent memory injection attacks:
1. Recall delimiter: Search() wraps every GLOBAL-scope memory value
with a non-instructable prefix before returning it to MCP clients:
[MEMORY id=<uuid> scope=GLOBAL from=<workspace_id>]: <value>
This prevents stored content (e.g. "IGNORE ALL PREVIOUS INSTRUCTIONS")
from being parsed as instructions in the agent's context window.
Raw DB content is unchanged — the wrapper is applied on read only.
2. Write audit log: Commit() writes an activity_log entry with
activity_type='memory_write_global' whenever a GLOBAL memory is
stored. The entry records a SHA-256 hash of the content (never
plaintext) alongside memory_id and namespace for forensic replay.
Audit failure is non-fatal — a logging error must not roll back
a successful write.
Tests:
- TestRecallMemory_GlobalScope_HasDelimiter — verifies exact delimiter
format [MEMORY id=... scope=GLOBAL from=...]: <value>
- TestCommitMemory_GlobalScope_AuditLogEntry — verifies activity_logs
INSERT fires on every GLOBAL write (via mock.ExpectationsWereMet)
- TestMemoriesCommit_Global_AsRoot — updated to expect the audit INSERT
All 16 Go test packages pass.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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| Dockerfile | ||
| Dockerfile.tenant | ||
| entrypoint-tenant.sh | ||
| go.mod | ||
| go.sum | ||