* Add PromptGuard guardrail integration
Add PromptGuard as a first-class guardrail vendor in LiteLLM's proxy,
supporting prompt injection detection, PII redaction, topic filtering,
entity blocklists, and hallucination detection via PromptGuard's
/api/v1/guard API endpoint.
Backend:
- Add PROMPTGUARD to SupportedGuardrailIntegrations enum
- Implement PromptGuardGuardrail (CustomGuardrail subclass) with
apply_guardrail handling allow/block/redact decisions
- Add Pydantic config model with api_key, api_base, ui_friendly_name
- Auto-discovered via guardrail_hooks/promptguard/__init__.py registries
Frontend:
- Add PromptGuard partner card to Guardrail Garden with eval scores
- Add preset configuration for quick setup
- Add logo to guardrailLogoMap
Tests:
- 30 unit tests covering configuration, allow/block/redact actions,
request payload construction, error handling, config model, and
registry wiring
* Fix redact path and init ordering per review feedback
- P1: Update structured_messages (not just texts) when PromptGuard
returns a redact decision, so PII redaction is effective for the
primary LLM message path
- P2: Validate credentials before allocating the HTTPX client so
resources aren't acquired if PromptGuardMissingCredentials is raised
- Add tests for structured_messages redaction and texts-only redaction
* Harden PromptGuard integration: fail-open, event hooks, images, docs
- Add block_on_error config (default fail-closed, configurable fail-open)
- Declare supported_event_hooks (pre_call, post_call) like other vendors
- Forward images from GenericGuardrailAPIInputs to PromptGuard API
- Wrap API call in try/except for resilient error handling
- Add comprehensive documentation page with config examples
- Register docs page in sidebar alongside other guardrail providers
- Expand test suite from 32 to 40 tests covering new functionality
* Fix dict[str, Any] -> Dict[str, Any] for Python 3.8 compat
* Address remaining Greptile feedback: timeout, redact guard
- Add explicit 10s timeout to async_handler.post() to prevent
indefinite hangs when PromptGuard API is unresponsive
- Guard redact path: only update inputs["texts"] when the key
was originally present, avoiding phantom key injection
- Add test: redact with structured_messages only does not create
texts key (41 tests total)
* Fix CI lint: black formatting, add PromptGuardConfigModel to LitellmParams
- Reformat promptguard.py to match CI black version (parenthesization)
- Add PromptGuardConfigModel as base class of LitellmParams for proper
Pydantic schema validation, consistent with all other guardrail vendors
- Use litellm_params.block_on_error directly (now a typed field)
* Address Greptile review: redact path, null decision, error context
- P1: Filter _extract_texts_from_messages to user-role messages only,
preventing system/assistant content from being injected into texts
- P1: Strengthen test_redact_updates_structured_messages assertion from
weak `in` check to strict equality, catching the injection bug
- P2: Use `result.get("decision") or "allow"` to handle explicit null
decision values (not just absent keys)
- P2: Wrap bare exception re-raise in GuardrailRaisedException so the
caller knows which guardrail failed (block_on_error=True path)
- P2: Add static Promptguard entry in guardrail_provider_map so the
preset works before populateGuardrailProviderMap is called
- Add test for explicit null decision treated as allow
* Fix black formatting: collapse f-string in error message
c688d9d6bc