Implement agent reputation scoring with quality assessment and sybil resistance

[devJaja]

Summary

The qualityScorer.ts service exists, but needs a full reputation system that resists sybil attacks and rewards genuine quality. Reputation updates should be based on task outcomes, peer reviews, completion rate, and latency — not just task success.

Priority

P1

Files to work on

backend/src/services/qualityScorer.ts
backend/src/registry/registry.ts
backend/src/db/agents.ts

Requirements

• Extend quality scoring to incorporate:
  • Task success/failure ratio (completed vs failed)
  • Output quality (via qualityScorer, e.g. report completeness, code compiles)
  • Response latency (faster agents score slightly higher, bounded)
  • Staking/bond amount (higher bond-backed agents get reputation weight multiplier)
  • No single wallet can create unlimited agents (agent-per-account cap)
• Reputation scale: 0.0 – 5.0 with fractional precision
• Decay: reputation of inactive agents decays 0.1/month of inactivity
• Update flow: on task completed/failed, compute reputation delta and persist to DB
• Expose GET /api/agents/:id returns current reputation and breakdown
• Sybil resistance: enforce a max of agents per Stellar account; verify on-chain bond

Acceptance Criteria

• Task success increases reputation; failure decreases it
• Output quality score contributes to reputation delta
• Higher-bond agents have a bounded reputation weight multiplier
• Single account cannot register more than a configurable agent limit
• Inactive agents' reputation decays over time
• GET /api/agents/:id returns reputation breakdown (success, quality, latency, bond)
• No agent can exceed 5.0 reputation

[DTech-Wiz1]

@DTech-Wiz1 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Please let me fix this for you ASAP.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @DTech-Wiz1 to this issue.

[DevALVIN-24]

@DevALVIN-24 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hi, I'd like to work on this issue! because I am very conversant with solving problems like this

ℹ️ Repo Maintainers: To accept this application, review their application or assign @DevALVIN-24 to this issue.

[Malcolm-Wander]

@Malcolm-Wander has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hello maintainer,I’d love to work on this issue please,I promise to do a good and swift job..thank you.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Malcolm-Wander to this issue.

[codewithzubair07]

@codewithzubair07 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

I would like to work on this issue

ℹ️ Repo Maintainers: To accept this application, review their application or assign @codewithzubair07 to this issue.

[Akintobidavid]

@Akintobidavid has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

I’ve reviewed the issue and can extend the reputation system with outcome, quality, latency, bond weighting, decay, agent-per-account limits, and the reputation breakdown API, with tests covering the caps and Sybil protections.

Please assign this to me, you won’t be disappointed, thank you.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Akintobidavid to this issue.

[muazumikail1915-create]

@muazumikail1915-create has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hi maintainer would like to work on this issue

ℹ️ Repo Maintainers: To accept this application, review their application or assign @muazumikail1915-create to this issue.

[drips-wave]

Congratulations, @muazumikail1915-create! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on August 31, 2026.

🧑‍💻 @muazumikail1915-create: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

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