Rebound

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CodeSentinel
stop the agent before it hallucinates architecture

Agentic coding agents are chaotic dynamical systems. Early decisions propagate errors that compound. By step 50 of a 500-step refactor, the agent may be generating architecturally plausible but functionally broken code — with no signal to the developer. CodeSentinel computes the safe task depth and auto-pauses at the horizon boundary.

24%of senior developers' week spent auditing AI output — the exact tax CodeSentinel targets.
The pain point

96% of developers don't fully trust AI-generated code without review, but the commercial pressure to deploy multi-step agents is accelerating. No tool tells you mathematically when an agent's reasoning has drifted into noise.

Use case

A platform team running Claude Code and Cursor on multi-step refactors across a 2M-line codebase.

Without Rebound
  • Agent keeps generating plausible code past the point of reliable reasoning.
  • Developers skim-review 50+ file changes; subtle regressions slip in.
  • Different agents (Claude, Gemini, GPT) used interchangeably with no fit-to-task routing.
  • No audit trail for SOC 2 or internal code-governance reviews.
With Rebound
  • Horizon Profiler computes max reliable task depth per codebase and task type.
  • Checkpoint Injector pauses the agent and requests human review at the horizon boundary.
  • Architectural Diversity Selector routes each task to the agent whose bias fits it best.
  • Immutable Trust Audit Trail exports for SOC 2, FedRAMP, internal governance.
Concrete example

A 29-step refactor, automatically paused at k* = 28 before coupling damage.

VS Code · Rebound CodeSentinel · session 8f3cagent: claude-code · k* = 28
k=1Scaffold route /api/checkoututility 0.96ALLOW
k=8Refactor service layer · 14 filesutility 0.89ALLOW
k=17Introduce new invariantsutility 0.78ALLOW
k=24Regenerate migrationutility 0.61WATCH
k=28Cross-module coupling editsutility 0.43CHECKPOINT
k=29→ Rebound paused agent · k* hitPAUSED · human
CI/CD GitHub Action
# .github/workflows/Rebound.yml
name: Rebound CodeSentinel
on: [pull_request]
jobs:
  sentinel:
    runs-on: ubuntu-latest
    steps:
      - uses: Rebound/codesentinel@v1
        with:
          task_plan: ".Rebound/plan.yaml"
          max_k:     "${{ vars.HG_MAX_K }}"
          agent:     "claude-code"
          block_on_checkpoint: true
          audit_upload: true
Ideal customer profile
  • Engineering orgs that have adopted Cursor, Claude Code, or Copilot Workspace
  • Companies building AI-native development platforms
  • Enterprises with engineering teams > 500
  • Critical-software companies (fintech, healthtech, defense-adjacent)
Buyers we work with
VP EngineeringCISOCTOHead of Developer Productivity
Typical deployment
Developer Pro
Individual power users
$49 / mo / seat
Team
Min 10 seats; shared checkpoints
$149 / mo / seat
Enterprise
Unlimited seats, on-prem, compliance dashboard
$2K–$15K / mo
Platform API
For AI tool builders
$0.003 / 1K tokens

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A 60-day Predictability Audit on your real workload, no commercial commitment.

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