bijotel 1.1.0

Forensic-grade tamper-evident audit chain for LLM applications. HMAC-SHA256 chain, content-addressable storage, pre-call policy gate, regression detection.

BIJOTEL

Forensic-grade tamper-evident audit chain for LLM applications.

BIJOTEL turns the spans your OpenTelemetry GenAI instrumentation already emits into a HMAC-sealed chain on disk, content-addressable storage with semantic dedup, and a pre-call policy gate that audits before it blocks. It's a plug-in to whatever tracer you have (OpenLLMetry, AnthropicInstrumentor, custom wrappers) — it does not replace your tracer; it extends it.

Status: v1.1.0 on PyPI. Production-validated through 13 consecutive days on the GENA agent ecosystem: 4,952 chain entries, 8 wheel upgrades, 0 chain breaks. API surface frozen for the v1.x line.

Install

pip install bijotel

Optional extras:

pip install "bijotel[anthropic]"     # Anthropic SDK + instrumentation
pip install "bijotel[openai]"        # OpenAI SDK
pip install "bijotel[api]"           # FastAPI + uvicorn → `bijotel serve`
pip install "bijotel[fingerprint]"   # sentence-transformers (semantic dedup)
pip install "bijotel[ast]"           # tree-sitter (Bash AST code safety)
pip install "bijotel[all]"           # everything above

Quickstart

import os
from opentelemetry import trace
from opentelemetry.sdk.trace import TracerProvider
from opentelemetry.instrumentation.anthropic import AnthropicInstrumentor

from bijotel.processors import HmacChainSpanProcessor, CasSpanProcessor

provider = TracerProvider()
provider.add_span_processor(
    HmacChainSpanProcessor(
        secret_key=bytes.fromhex(os.environ["BIJOTEL_HMAC_SECRET"]),
        db_path="chain.db",
    )
)
provider.add_span_processor(CasSpanProcessor(db_path="chain.db"))
trace.set_tracer_provider(provider)
AnthropicInstrumentor().instrument()

# Now every anthropic.chat call is sealed in the chain with full canonical
# body, prev_hash linkage, HMAC, and CAS-deduped body storage.

Generate a fresh secret:

export BIJOTEL_HMAC_SECRET=$(python -c "import secrets; print(secrets.token_hex(32))")

Verify integrity later:

bijotel verify --db chain.db

CLI

After install, the bijotel command exposes 8 subcommands:

bijotel verify --db chain.db                   # full HMAC re-verification
bijotel inspect --db chain.db 4952              # one entry's canonical body
bijotel stats --db chain.db                    # chain + CAS + policy stats
bijotel list --db chain.db --since 2026-05-20  # filterable browsing
bijotel export --db chain.db --output out.json # signed portable JSON
bijotel verify-export out.json                  # auditor-side verification
bijotel regression --db chain.db --window 100  # z-score + IQR drift
bijotel serve --port 8080 --db chain.db        # REST API + Swagger UI

--since uses UTC calendar dates (YYYY-MM-DD, lower bound inclusive at 00:00:00Z), consistent across all subcommands.

REST API (bijotel serve)

bijotel serve exposes 18 endpoints. Full OpenAPI 3.1 spec at /openapi.json, interactive Swagger UI at /docs.

Method	Path	Description
GET	/health	Liveness + version + db_exists
GET	/version	Package version metadata
GET	/docs	Swagger UI
GET	/redoc	ReDoc UI
GET	/openapi.json	OpenAPI 3.1 spec
GET	/chain	Paginated chain rows, since/until filters
GET	/chain/stats	Aggregate counters (entries/CAS/dedup/age)
GET	/chain/{seq}	One entry with full canonical body
POST	/chain/verify	Smoke (default) or full=true canonical
GET	/policy/rules	Active rules + closure introspection
POST	/policy/evaluate	Dry-run a request through the engine
GET	/layers	14-layer bijuterii manifest
GET	/regression/latest	Most recent persisted run
GET	/regression/history	Paginated timeline
POST	/regression/run	Execute fresh run (optionally persist)
POST	/export	Download a signed JSON snapshot
POST	/export/verify	Upload + return validity + reason

Optional Bearer auth

Set BIJOTEL_API_KEY on the serve process and all endpoints (except /health, /version, /docs, /redoc, /openapi.json) require Authorization: Bearer <key>. Constant-time comparison (hmac.compare_digest). Empty / unset env = no auth (dev mode).

Dashboard

A React/Vite dashboard ships in src/bijotel/dashboard/:

Page	URL	What it does
Chain Explorer	/chain	4 stats cards + paginated table + click-row → side panel with full canonical body; Verify + Export buttons
Policy Decisions	/policy	Active-rules grid + live Evaluate form (dry-run a prompt) + layers grid
Regression Monitor	/regression	Status cards + recharts timeline (24h/7d/30d/all) + per-dimension breakdown + Run-Now panel
System Status	/system	Full 14-layer manifest table

Bundle stays under 100 KB gzip on initial load thanks to per-route code splitting; the heavy recharts chunk lazy-loads only when /regression is visited.

Dev:

cd src/bijotel/dashboard
npm install
npm run dev   # http://localhost:5173 with /api proxied to :8080

Production build → dashboard_dist/ at project root. Day 12 polish wires bijotel serve --dashboard to mount it as static.

13 AI safety bijuterii covered

Each layer maps to a catalog pattern. active = wired in this process (with runtime evidence); available = code ships, host can opt in; planned = v1.3+.

#	Bijuterie	Layer	Status
11	Forensic-First	HMAC-SHA256 chain (HmacChainSpanProcessor)	active
2	Content-Addressable	CAS + Merkle DAG	active
10	Compliance-as-Code	PolicyEngine + 8 rule factories	active
16	Regression Detection	z-score + IQR over input_tokens/output_tokens/cost	active
19	OTel GenAI Semconv	Compatible with OpenLLMetry, Anthropic/OpenAI instrumentors	active
7	Provider Protocol	AnthropicAdapter, OpenAIAdapter	active
7	Deterministic + Semantic Fingerprinting	SHA-256 + sentence-transformers	available
5	AST-First Code Safety	tree-sitter bash + stdlib Python ast	available
15	Inference Routing	Pareto cost/quality/latency + per-agent budget	available
18	Misalignment Probes	29 probes across 8 attack categories	available
D	Containment (Combo D)	Permitted + Safe + Sealed orchestrator	available
3	Energy Accounting	per-call kWh + carbon estimate	planned
9	Consensus Voting	Multi-model agreement	planned

What makes BIJOTEL different

• HMAC-SHA256 tamper-evident chain. Each span carries prev_hash || canonical_hash re-hashed with a server secret. Any mutation — even reordering — breaks verification. The bijotel-chain-v1 export schema lets external auditors verify with the secret alone, no SQLite access.
• Content-addressable storage with semantic dedup. Identical request bodies share storage; the dedup factor surfaces as a metric (/chain/stats field). The Merkle DAG layer (#2) enables reference-graph queries.
• Pre-call policy gate with audit trail. Eight rule factories (prompt_pattern_deny, pii_detection, output_length_limit, model_allowlist, model_version_pin, cost_per_call_max, daily_token_budget, rate_limit_calls_per_minute) compose into a PolicyEngine. Decisions: allow / warn / deny. Warnings attach to the span via bijotel.policy.warning. Denies emit a synthetic chain entry with bijotel.blocked=true.
• Statistical regression detection on the chain itself. No separate metrics pipeline. RegressionDetector reads from chain.db, computes baseline + flags drift on input_tokens / output_tokens / cost using z-score AND IQR (default BOTH mode minimizes false positives).
• Composable with upstream OTel instrumentors. BIJOTEL adds SpanProcessors on top of your existing opentelemetry-instrumentation-anthropic / opentelemetry-instrumentation-openai chain. It never wraps the SDK call itself, so there's no provider-specific glue to maintain.

Production validated

The v1.1.0 release passed a Day-10 integration test against GENA's production agent ecosystem (Aisophical):

• 13 days continuous operation, 4 wheel upgrades (v0.5.0 → v0.6.0 → v0.6.1 → v1.1.0).
• 4,952 chain entries, POST /chain/verify with full=true returns valid:true — cross-version HMAC continuity.
• 0 chain breaks across the upgrade window; the chain processor's BEGIN IMMEDIATE critical section + WAL mode survived all concurrent-writer scenarios that came up.
• First production regression baseline persisted: cost $0.0033 ± $0.0008 per call (24% relative stdev); ~396 spans/day.
• 18/18 endpoints responded correctly against the live chain.
• POST /export produced a 48.1 MB signed snapshot; POST /export/verify confirmed validity.

Full report in INTEGRATION_TEST_20260523.md.

Known issues

• Dashboard bijotel serve --dashboard not wired yet (planned v1.3+). Today's pattern: run bijotel serve on the backend, run Vite dev server (or any static host) on the dashboard side, point the proxy at :8080.
• Vite dev server binds IPv6-only on some Windows installs. curl 127.0.0.1:5173 returns nothing; use curl localhost:5173 (DNS resolves to ::1) or curl '[::1]:5173'. Browsers are fine.
• GENA-style deploys that install the wheel without extras must add python-multipart to their requirements.txt if they want POST /export/verify to register (FastAPI's UploadFile requires it). The [api] extra carries it transitively.
• GitHub source repository remains private during the v1.x.x development window — the URLs in PyPI metadata (Documentation, Issues, Changelog, Source) currently 404 for external visitors. This is intentional and will flip when the repo goes public.

License

MIT