Task 1.2: introduce a single path resolver so no harness script hardcodes
`.specify/...` scattered across the tree. casan-paths.sh resolves four roots
(HARNESS/STATE/GOVERNANCE/APP) by marker-based walk-up from its own location —
never `git rev-parse` (git root is the repo PARENT here, not the app dir).
- 101 bash scripts/tests: 238 hardcoded `$PROJECT_ROOT/.specify/...` refs rewritten
to CASAN_HARNESS_ROOT (code) / CASAN_STATE_ROOT (logs,state) / CASAN_GOVERNANCE_ROOT.
Sandbox test vars ($WORK/$TP/$FP/$T1_WORK) left untouched.
- Roots are NOT exported: each script/subprocess self-resolves from its own tree,
matching the original per-script semantics and preserving hermetic sandbox isolation
(node casan-step.mjs, copied telemetry/rollback scripts must not inherit real roots).
- Sandbox tests that copy a harness script now also copy casan-paths.sh (its new
sibling dependency): adversarial (verify-audit-chain/verify-tool-audit/rollback) +
track-a (security-check/telemetry-integrity).
- control-plane-settings.json reclassified as STATE (untracked runtime store).
Roots all still resolve to `.specify` in this monolithic layout, so behavior is
unchanged. Full gate: PASS=64 FAIL=0 SKIP=3 (adversarial 44/0, track-a 25/0).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
A4 (V9): telemetry-integrity.sh binds provider-usage.jsonl + cost/metrics.jsonl
to a signed manifest head. Tampering a token flips the head (MISMATCH); an
attacker who rewrites the head cannot re-sign it (SIGNATURE_INVALID) without
the off-repo key. sign-audit-head.sh now also signs telemetry (best-effort).
Supports CASAN_AUDIT_PRIV/PUB overrides for self-contained verification.
A5 (V12/V13/V14): cost-spike-detect.sh adds an absolute per-call cap
(CASAN_COST_ABSOLUTE_MAX_TOKENS, enforced from record #1 → catches slow-boil
and cold-start) and a cumulative budget (CASAN_COST_CUMULATIVE_BUDGET_TOKENS →
catches under-threshold spray), keeping the existing median×mult spike test.
Backward compatible: <3 records with no caps still exits 3.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
