Proof-of-concept proving the diagnostics-redaction exit criterion from
docs/architecture/proof-of-concept-plan.md §2:
"Password and identity-secret samples are redacted."
Full coverage of the audit-report test matrix in
docs/security/diagnostic-redaction-audit-report.md §4
(REDACT-TC-001..010), plus two sanity tests.
The spike ships:
- RedactionPolicy: typed catalogue of regex rules
(identity-base64-blob, password-kv, ts3server-url-password,
authorization-bearer, linux/windows/macos user-path) with
optional capture-group narrowing.
- Structured-field redaction keyed on case-insensitive name
substrings (password, secret, token, ...).
- Bundle-level switches: chat and channel tree excluded by
default per audit-report §5.
- KnownSecretRegistry: literal-substring scrub for secrets the
host application has already loaded into memory (defense in
depth that regexes alone cannot guarantee — closes the gap
behind REDACT-TC-002).
- Length cap (MAX_PROTOCOL_STRING_LEN = 256) with truncation
marker for REDACT-TC-009.
- UTF-8 preserved in non-sensitive fields per REDACT-TC-010 /
ADR-008.
Test suite (12/12 PASS on 2026-05-13):
REDACT-TC-001 server password in connection data
REDACT-TC-002 identity secret in storage error (via KnownSecretRegistry)
REDACT-TC-003 server URL with password field
REDACT-TC-004 chat text excluded by default
REDACT-TC-005 channel name with Unicode excluded by default
REDACT-TC-006 nickname with Unicode preserved in safe field
REDACT-TC-007 local file path user segment minimized
REDACT-TC-008 mixed sensitive bundle (whole-bundle JSON scan)
REDACT-TC-009 long hostile protocol string truncated
REDACT-TC-010 multilingual safe text preserved
+ known-secret literal scrub
+ empty registered secret ignored
Out of scope: tracing-subscriber integration, diagnostic export
file format, memory/core dumps, performance, adversarial regex
evasion beyond trivial cases. These belong to chanora_diagnostics.
Authority: PoC plan §2, docs/security/diagnostic-redaction-audit-report.md,
SRS-093, SysRS-152/154/155.
Not product code; not promoted into chanora_diagnostics.
EdisonJwa
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