Duadp ossa technical proposal
TECHNICAL PROPOSAL
DUADP × OSSA Future Feature Roadmap
Reputation, Semantic Discovery, Conformance & Metering
| Prepared for | Bluefly.io / OSSA Project |
| Prepared by | [Your Name] |
| Date | 30 June 2026 |
| Version | v1.0 |
| Rate | \$35 / hour |
| Total Estimate | 562 hours (~\$19,670) |
| Status | Proposal |
Confidential
1. Product Summary
This proposal covers the design and implementation of four advanced capabilities for the DUADP (Decentralized Universal AI Discovery Protocol) and OSSA (Open Standard for Software Agents) platform, built into the @bluefly/duadp and @bluefly/openstandardagents npm packages. The four features — Reputation & Outcome Attestation, Semantic/Intent Discovery, Conformance & Certification, and an Economic/Metering Layer — collectively transform the existing agent-discovery infrastructure into a trust-aware, intent-searchable, standards-certified, and commercially metered ecosystem for AI agents.
The work extends an existing, production-grade TypeScript/Node.js codebase that already provides DID-based identity, Ed25519 signatures, gossip/CRDT federation, trust-tier gating, and OSSA manifest validation. Each new feature is designed to layer on top of this foundation with high code reuse, keeping scope bounded and delivery predictable.
2. Core Problem & Users
Problem: AI agents today lack a standardized trust, discovery, and billing infrastructure. There is no universal way to verify an agent’s track record, discover agents by intent rather than keywords, certify spec conformance, or meter and settle usage across organizational boundaries. Without these capabilities, enterprise adoption of multi-agent workflows remains blocked by trust and governance gaps.
Primary Users: Agent developers publishing to the DUADP registry, enterprise platform teams consuming agents across federated nodes, compliance officers requiring auditable conformance and billing, and the OSSA open-source community building on these primitives.
Success Criteria: (1) Signed outcome receipts propagate reputation scores across federated nodes within seconds. (2) Natural-language intent queries return correct agents even when tagged with different keywords. (3) Automated conformance probes produce signed, expiring certificates that drive trust-tier promotion/demotion. (4) Metered usage flows through a priced, quota-gated, auditable billing pipeline with zero silent over/under-billing.
3. Requirements
3.1 Functional & Non-Functional Requirements
| ID | Requirement | Type | Priority | Notes |
| R1 | Signed outcome receipts emitted on every agent run | F | P0 | Ed25519, reusable by F04 |
| R2 | Receipt verification endpoint with Sybil guard | F | P0 | POST /receipts |
| R3 | 5-dimensional reputation vector with time-decay | F | P0 | Per-GAID scoring |
| R4 | EigenTrust-style caller weighting + confidence bands | F | P0 | Fake reporters carry ~0 weight |
| R5 | CRDT reputation propagation over gossip layer | F | P0 | Reuses existing federation |
| R6 | Drift detection + history API | F | P1 | GET .../history |
| R7 | Dispute endpoint with stake flow | F | P1 | Stake-backed challenges |
| R8 | Vector embedding index (sqlite-vec / HNSW) | F | P0 | Pluggable embedder |
| R9 | Embed-on-publish hook in OSSA publish flow | F | P0 | Auto-index new resources |
| R10 | Hybrid retrieval: vector + keyword + taxonomy | F | P0 | Ranked local matches |
| R11 | Federated fan-out + score-merge + dedup | F | P0 | POST /match |
| R12 | Reputation re-rank hook | F | P1 | Track-record-aware results |
| R13 | Node conformance probe suite (spec compliance) | F | P0 | CLI + scored report |
| R14 | Export verifier — Docker sandbox build + smoke | F | P0 | ossa certify command |
| R15 | Export verifier — k8s + LangChain targets | F | P1 | Additional deploy targets |
| R16 | Signed certificate format + trust-tier ingest | F | P0 | Expiring certs |
| R17 | Pricing in OSSA manifest (spec.pricing) | F | P0 | GET /pricing/:gaid |
| R18 | Metering ledger + usage receipts | F | P0 | Reuses F01 receipt rail |
| R19 | Entitlements / quota with 402 flow | F | P0 | Pre-exec capability tokens |
| R20 | Settlement — credit ledger (core path) | F | P0 | Prepaid credit model |
| R21 | Settlement — invoice aggregation | F | P1 | Usage to invoices |
| R22 | Settlement — micropayment adapter | F | P2 | Pluggable rail |
| R23 | Runtime metering middleware in export adapters | F | P0 | Per-call usage emission |
| R24 | Billing audit (NIST-aligned) + reconciliation | F | P0 | No silent billing errors |
| R25 | Financial correctness — no over/under-billing | NF | P0 | Reconciliation tests |
| R26 | Sub-second CRDT merge latency on LAN | NF | P0 | Federation performance |
| R27 | Integration test coverage for all features | NF | P0 | Automated CI |
| R28 | API documentation for all new endpoints | NF | P0 | Developer docs |
3.2 Out of Scope
-
Production infrastructure, monitoring, and ops beyond staging
-
Provider accounts / credentials for embedding models or payment rails
-
Legal / regulatory sign-off for the Metering rail
-
UI/dashboard for reputation scores or billing (API-only in v1)
-
Multi-language SDK ports (TypeScript/Node.js only)
-
Performance optimization beyond reasonable baseline (e.g., GPU-accelerated embeddings)
4. Recommended Tech Stack & Third-Party Services
| Component | Choice | Why | Alternative | Est. Cost |
| Runtime | Node.js 20+ | Existing codebase, TypeScript-first | Deno / Bun | Free |
| Language | TypeScript 5.x | Already in use across both packages | N/A | Free |
| Crypto / Signing | @noble/ed25519 | Audited, 0-dep, RFC 8032 compliant, 5KB | tweetnacl | Free (OSS) |
| Vector Index | sqlite-vec | Embeddable, SIMD-accelerated, no server needed | Pinecone / pgvector | Free (OSS) |
| Embeddings | Pluggable (OpenAI / Nomic / Ollama) | Swap without re-architecture; model_id tracked | Cohere Embed v3 | \$0–\$50/mo |
| Federation / CRDT | Existing gossip layer | Already built + tested in @bluefly/duadp | N/A | Free |
| Database | SQLite (better-sqlite3) | Existing stack; zero-config, embedded | PostgreSQL | Free |
| Testing | Vitest + Supertest | Fast, TypeScript-native, HTTP assertions | Jest | Free |
| Containerisation | Docker (for F03 sandbox) | Export verifier builds + smoke-tests in container | Podman | Free |
| CI / CD | Existing pipeline | Assumed in place per project assumptions | GitHub Actions | Free |
5. Solution Approach
Feature 01 — Reputation & Outcome Attestation
Every agent run will emit a signed outcome receipt using Ed25519 via @noble/ed25519. Receipts are posted to a verification endpoint that validates signatures and applies a basic Sybil guard before updating a 5-dimensional reputation vector per GAID (Global Agent ID). Caller weighting uses an EigenTrust-style algorithm so that reports from low-trust callers carry near-zero influence. The reputation deltas propagate to federated peers via the existing gossip/CRDT layer, feeding into search ranking, confidence gates, and trust tiers. Build decision: the receipt schema, signing, and reputation engine are all custom (no off-the-shelf reputation SaaS fits this decentralized, DID-based model), but the cryptographic primitives and CRDT transport are reused from existing code, saving significant effort.
Feature 02 — Semantic / Intent Discovery
Agent resources will be embedded at publish time using a pluggable embedding model, stored in a sqlite-vec HNSW index alongside a model_id and dimension marker for consistency. A new POST /match endpoint performs hybrid retrieval: vector similarity, keyword/facet matching, and OSSA taxonomy expansion. Results fan out across federated nodes, get score-merged and GAID-deduplicated. If Feature 01 is present, results re-rank by track record. Build decision: sqlite-vec is used instead of a hosted vector database (Pinecone, Weaviate) because the system is designed for edge/embedded deployment with no external service dependency. The embedder is pluggable to allow hot-swapping without re-architecture.
Feature 03 — Conformance & Certification
Two test harnesses are built: a node conformance suite that probes any DUADP node against the normative spec (endpoints, schemas, 6-stage gate, error codes), and an export verifier that builds an OSSA export in a Docker sandbox and smoke-tests it. Passing runs produce a signed, time-limited certificate that promotes the subject’s trust tier; expiry demotes it. Build decision: the conformance suite is entirely custom (no existing tool tests DUADP/OSSA spec compliance). Docker is the primary sandbox target; k8s and LangChain targets are additive and built afterward using the same harness structure.
Feature 04 — Economic / Metering Layer
The marketplace layer: agents advertise pricing in the OSSA manifest (spec.pricing), callers are quota-gated with pre-execution capability tokens and a 402 flow for over-quota, and each call emits a metered usage receipt (extending the Feature 01 receipt with billable units). Settlement is pluggable: the core path is a credit ledger, with invoice aggregation and an optional micropayment adapter layered on top. A NIST-aligned billing audit and reconciliation suite ensures no silent over/under-billing. Build decision: receipt-based metering reuses the F01 signed-receipt rail, dramatically reducing the effort for a “Large” feature. The settlement rail defines only receipt + settlement reference (never a currency), keeping compliance footprint minimal.
6. Epics & Tasks
Rate: \$35/hour | Productive day: 6 hours | All estimates include integration + basic testing + debugging
Epic 0: Kickoff & Receipt Schema Lock
Goal: Confirm reuse assumptions, lock the outcome-receipt schema, and validate existing tables / gossip / trust-tier primitives before any feature work begins.
| # | Task | Subtasks | 3rd-Party / Tool | Hours | Cost |
| 0.1 | Validate reuse assumptions | Audit existing tables, gossip/CRDT layer, trust-tier system; confirm usability | better-sqlite3, existing DUADP code | 4 | \$140 |
| 0.2 | Lock receipt schema | Define outcome-receipt JSON schema, Ed25519 envelope, versioning strategy | @noble/ed25519 | 2 | \$70 |
Epic 0 Total: 6 hours | \$210
Epic 1: Reputation & Outcome Attestation
Goal: Build the signed outcome-receipt pipeline, 5-D reputation engine, EigenTrust weighting, and CRDT propagation. This is the foundational rail that Features 02 and 04 reuse.
| # | Task | Subtasks | 3rd-Party / Tool | Hours | Cost |
| 1.1 | Outcome receipt — schema + signing + emit-on-completion | Define receipt type, Ed25519 sign function, hook into OSSA agent-runner.ts emit lifecycle | @noble/ed25519 | 12 | \$420 |
| 1.2 | Receipt endpoint + signature verification + Sybil guard | POST /receipts route, verify Ed25519 sig, rate-limit per DID, reject duplicates | @noble/ed25519, express | 12 | \$420 |
| 1.3 | Reputation engine — 5-D vector + time-decay | reputation-engine.ts: compute composite score from 5 dimensions, apply exponential time-decay | Custom algorithm | 12 | \$420 |
| 1.4 | Caller weighting (EigenTrust-style) + confidence bands | Implement normalised trust matrix, power iteration, confidence intervals, integration tests | Custom (EigenTrust paper) | 18 | \$630 |
| 1.5 | CRDT propagation over gossip + wire into gate/trust/federation | Extend existing CRDT delta format, merge reputation vectors, feed confidence-gate and trust-tier | Existing gossip/CRDT | 18 | \$630 |
| 1.6 | Drift detection + history endpoint | drift-detector.ts: detect score drift over sliding window, GET .../history API | Custom | 12 | \$420 |
| 1.7 | Dispute endpoint + stake flow + manifest opt-in | POST /disputes with stake lock, resolution flow, manifest dispute-policy field | Custom | 12 | \$420 |
| 1.8 | Integration tests, hardening, docs | E2E tests for receipt flow, reputation update, propagation; API docs; edge cases | Vitest, Supertest | 12 | \$420 |
Epic 1 Total: 108 hours | \$3,780
Epic 2: Semantic / Intent Discovery
Goal: Enable intent-based agent retrieval via vector embeddings, hybrid search, and federated fan-out so that natural-language queries find the right agent regardless of keyword tagging.
| # | Task | Subtasks | 3rd-Party / Tool | Hours | Cost |
| 2.1 | Embedding index + embeddings table + pluggable embedder | embedding-index.ts: sqlite-vec virtual table, model_id + dim columns, adapter interface for embedder | sqlite-vec | 18 | \$630 |
| 2.2 | Embed-on-publish hook | Hook into publishResourceWithChecks(), generate embedding, upsert into index | sqlite-vec, embedder API | 6 | \$210 |
| 2.3 | Hybrid retrieval — vector + keyword/facet + taxonomy | semantic-search.ts: KNN query, BM25 keyword fallback, OSSA taxonomy expansion, score fusion | sqlite-vec | 18 | \$630 |
| 2.4 | Federation fan-out + score-merge + GAID dedup | POST /match route, parallel fan-out to peers, score normalisation, dedup by GAID; duadp_match MCP tool | Existing federation | 18 | \$630 |
| 2.5 | Reputation re-rank hook + cross-node embedding consistency | If F01 present, blend reputation score into ranking; validate embedding model consistency across nodes | F01 reputation engine | 6 | \$210 |
| 2.6 | Retrieval-quality check, tests, docs | Measure recall/precision on test set, integration tests, API docs | Vitest | 12 | \$420 |
Epic 2 Total: 78 hours | \$2,730
Epic 3: Conformance & Certification
Goal: Deliver automated conformance probing and export verification that produces signed, expiring certificates feeding into the trust-tier system.
| # | Task | Subtasks | 3rd-Party / Tool | Hours | Cost |
| 3.1 | Node conformance suite — endpoint / schema / gate probes | conformance/: probe all DUADP endpoints, validate response schemas, test 6-stage gate, well-known, error codes; scored report output | Custom, Vitest | 30 | \$1,050 |
| 3.2 | Export verifier — Docker sandbox build + smoke test | ossa certify: pull OSSA export, docker build, start container, validate manifest, smoke-test endpoints | Docker SDK (dockerode) | 24 | \$840 |
| 3.3 | Export verifier — k8s + LangChain targets | Extend verifier for k8s helm deploy + LangChain adapter test; reuse harness from 3.2 | kubectl, LangChain | 12 | \$420 |
| 3.4 | Certificate format, signing, verification + trust.ts ingest | cert-verifier.ts: define cert JSON, Ed25519 sign/verify, ingest into trust.ts for tier promotion; /.well-known badge | @noble/ed25519 | 18 | \$630 |
| 3.5 | Certificate endpoints + expiry + re-certification | POST /certs/submit, GET /certs/:id, cron-based expiry check, auto-demotion on expiry | Custom | 6 | \$210 |
| 3.6 | Tests, docs | Integration tests for full probe-to-cert-to-tier flow; CLI docs; API docs | Vitest, Supertest | 12 | \$420 |
Epic 3 Total: 102 hours | \$3,570
Epic 4: Economic / Metering Layer
Goal: Build the marketplace layer: pricing in manifests, metered usage, quota/entitlement gating, pluggable settlement, and NIST-aligned billing audit.
| # | Task | Subtasks | 3rd-Party / Tool | Hours | Cost |
| 4.1 | Pricing in manifest (spec.pricing) + GET /pricing/:gaid | Extend OSSA manifest schema with pricing block, validation, REST endpoint, tests | Custom | 12 | \$420 |
| 4.2 | Metering ledger + usage receipt (reuses F01 rail) | POST /usage, extend outcome receipt with billable units, running balance per caller DID, ledger table | F01 receipt rail | 18 | \$630 |
| 4.3 | Entitlements / quota — pre-exec tokens + 402 flow | entitlement.ts: capability token per caller DID, check before execution, return 402 with top-up link on over-quota | Custom | 24 | \$840 |
| 4.4 | Settlement — credit-ledger (core path) | Credit deposit, debit on usage, balance API, double-entry accounting | Custom | 18 | \$630 |
| 4.5 | Settlement — invoice aggregation | Aggregate usage into periodic invoices, invoice schema, GET /invoices/:callerId | Custom | 12 | \$420 |
| 4.6 | Settlement — optional micropayment adapter | Pluggable adapter interface, reference implementation (e.g., Lightning / Stripe stub) | Adapter pattern | 12 | \$420 |
| 4.7 | Runtime metering middleware in export adapters | Inject per-call metering into Docker / k8s / LangChain export adapters; auto-emit usage | Custom middleware | 18 | \$630 |
| 4.8 | Billing audit (NIST-aligned) + reconciliation + correctness tests | Audit log, reconcile ledger vs. receipts, property-based tests for no over/under-billing | Vitest, fast-check | 24 | \$840 |
| 4.9 | Hardening, security pass, docs | Input validation, rate limits, abuse scenarios, API docs, developer guide | Custom | 12 | \$420 |
Epic 4 Total: 150 hours | \$5,250
Epic 5: Integration & Handover
Goal: End-to-end integration testing across all four features, final hardening, and documentation handover.
| # | Task | Subtasks | 3rd-Party / Tool | Hours | Cost |
| 5.1 | Cross-feature integration tests | Test receipt → reputation → search ranking → metering pipeline end-to-end across two federated nodes | Vitest, Docker | 12 | \$420 |
| 5.2 | Final hardening + edge-case sweep | Concurrency, failure modes, rollback, data corruption guards | Custom | 6 | \$210 |
| 5.3 | Documentation + handover | Architecture decision records, deployment guide, API reference, runbook | Markdown | 6 | \$210 |
Epic 5 Total: 24 hours | \$840
7. Timeline & Cost Summary
| Epic | Hours | Working Days (6h) | Elapsed Weeks | Cost (\$35/hr) |
| Epic 0: Kickoff & Schema Lock | 6 | 1 | Day 1 | \$210 |
| Epic 1: Reputation & Attestation | 108 | 18 | ~5 weeks | \$3,780 |
| Epic 2: Semantic / Intent Discovery | 78 | 13 | ~3 weeks | \$2,730 |
| Epic 3: Conformance & Certification | 102 | 17 | ~4 weeks | \$3,570 |
| Epic 4: Economic / Metering Layer | 150 | 25 | ~6 weeks | \$5,250 |
| Epic 5: Integration & Handover | 24 | 4 | ~1 week | \$840 |
| Subtotal | 468 | 78 days | ~19 wks | \$16,380 |
| Buffer (20% for unknowns) | 94 | ~16 days | ~4 wks | \$3,290 |
| GRAND TOTAL | 562 | ~94 days | ~23 wks | \$19,670 |
Payment note: The 20% buffer (\$3,290) is a separate, transparent line item. It is drawn only against verified unknowns (export sandboxing, settlement rail compliance) and is not silently distributed across tasks. Unused buffer is not billed.
7.1 Milestone-Based Billing Schedule
Each milestone is a working, demonstrable increment that can serve as an acceptance and payment gate.
| Milestone | Target | Deliverable | Hours | Cost | Cumulative |
| M0 | Day 1 | Kickoff — reuse confirmed, receipt schema locked | 6 | \$210 | \$210 |
| M1 | Wk 5 | Reputation live — receipts → 5-D vector → propagation → gates | 108 | \$3,780 | \$3,990 |
| M2 | Wk 8 | Semantic discovery — federated intent match, reputation-ranked | 78 | \$2,730 | \$6,720 |
| M3 | Wk 12 | Conformance — probes + signed certs moving trust tiers | 102 | \$3,570 | \$10,290 |
| M4 | Wk 18 | Metering — priced, gated, metered, settled, audited usage | 150 | \$5,250 | \$15,540 |
| M5 | Wk 19 | Complete — E2E integration, hardening, handover | 24 | \$840 | \$16,380 |
| Buffer | As needed | Drawn only against documented unknowns | 94 | \$3,290 | \$19,670 |
7.2 Illustrative Calendar (Kickoff: 14 July 2026)
| Phase | Jul '26 | Aug | Sep | Oct | Nov | Dec |
| Kickoff (Day 1) | ■ | |||||
| 01 Reputation | ■ | ■ | ||||
| 02 Semantic | ■ | ■ | ||||
| 03 Conformance | ■ | ■ | ||||
| 04 Metering | ■ | ■ | ||||
| Integration & Handover | ■ | |||||
| Buffer / Contingency | ■ |
8. Risks & Assumptions
8.1 Risks
| Risk | Likelihood | Impact | Mitigation |
| Reuse assumptions don’t fully hold (tables/gossip need adapting) | Low | High | Day-one validation check (Epic 0) catches this before any feature work begins; findings adjust the plan immediately |
| Export verifier sandboxing across targets (F03) | Medium | Medium | Docker certified first (highest value); k8s + LangChain sit at end of epic and draw on buffer if needed |
| Financial-correctness defects in metering (F04) | Medium | High | Dedicated reconciliation + property-based tests; simplest rail (credit ledger) first; reuse tested F01 receipt pipeline |
| Settlement rail brings compliance obligations (F04) | Medium | High | Protocol defines only receipt + settlement reference, never a currency; legal sign-off owned by client |
| Retrieval quality underwhelms (F02) | Medium | Medium | Pluggable embedder architecture — swap model without re-architecting; retrieval-quality test suite catches regressions |
| Slow decisions / review cycles from client | Medium | Medium | Open decisions logged with owners; unanswered questions pause that feature’s clock rather than eating budget |
| Scope growth mid-build | Medium | Medium | New scope estimated in hours and scheduled as a change request; never silently absorbed |
8.2 Assumptions
- Solo, full-time engagement. One developer, sequential work. No ramp-up period required — the developer is already fluent in this codebase.
- Repo access on day one to both @bluefly/duadp and @bluefly/openstandardagents, with working CI and a staging environment.
- Existing tables, gossip/CRDT federation, and trust-tier system are usable as described in the roadmap. Day-one check confirms.
- Spec questions, embedder choice (F02), and settlement-rail choice (F04) are answered within 1–2 business days.
- The DUADP spec and OSSA manifest schema are stable. Material changes mid-build are change requests, not slippage.
- Billing at \$35/hour, invoiced per milestone. Buffer drawn only against documented unknowns.
9. Open Questions for the Client
- Embedding model preference: hosted API (OpenAI, Cohere, Nomic) or self-hosted (Ollama)? This affects the cost column and latency profile of Feature 02.
- Settlement rail preference for Feature 04: is the credit-ledger sufficient for v1, or do you need invoice and/or micropayment settlement at launch?
- Are all four features confirmed, or is a subset in play? Any feature except Metering can be delivered independently at the hours shown.
- Preferred kickoff date? Calendar shifts; day counts don’t change.
- Is there a target for maximum acceptable latency on federated /match queries?
- Who owns legal/regulatory review for the Metering rail’s compliance footprint?
- Billing cadence preference: per-milestone, bi-weekly, or monthly?
10. Commercial Summary
| Hourly Rate | \$35 / hour |
| Estimated Hours (excl. buffer) | 468 hours |
| Buffer (20%) | 94 hours |
| Total Estimated Hours | 562 hours |
| Estimated Total Cost | \$19,670 |
| Estimated Duration | ~23 weeks (~5.5 months including buffer) |
| Payment Structure | Milestone-based (see §7.1) |
| Buffer Policy | Drawn only against documented unknowns; unused buffer is not billed |
| Change Requests | Estimated in hours and added as separate line items |
| Progress Reporting | Status note at end of each feature: done / in-progress / blocked vs. planned hours |
End of Proposal | v1.0 | 30 June 2026