Prior state: compliance.mode default was "" (fully off) and no template
in the repo set it explicitly — so prompt-injection detection, PII
redaction, and agency-limit checks were silently disabled on every
live workspace, despite the machinery being present in
workspace/builtin_tools/compliance.py.
This was surfaced during a 2026-04-24 review of the A2A inbound path:
a2a_executor.py gates three security checks on
_compliance_cfg.mode == "owasp_agentic"
and default config never matches, so every A2A message skipped all three.
Fix: default is now owasp_agentic + prompt_injection=detect. Detect mode
logs injection attempts as audit events without blocking — no UX cost,
just visibility. Operators who want stricter enforcement set
`prompt_injection: block` per workspace. Operators who genuinely want
compliance fully off can set `mode: ""` (not recommended; documented).
Changes:
- ComplianceConfig.mode default: "" → "owasp_agentic"
- Yaml parser fallback default: "" → "owasp_agentic" (must match dataclass)
- Docstring updated with rationale + opt-out snippet
Tests: 66/66 test_compliance.py + test_a2a_executor.py pass. 19/19
test_config.py pass. The one test asserting compliance_mode == "" is
for the "config load failed" fallback path (different from the default
config path) — correctly unchanged.
Security posture improvement: prompt-injection detection is now always
on for every workspace created after this ships, with zero behavior
change for legitimate inputs. Block mode remains an opt-in when an
operator wants to actively reject injection attempts rather than just
log them.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
