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refactor(subagents): add driver registry and runtime policy - #381
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| Layer / File(s) | Summary |
|---|---|
Runtime policy contract and pool identity src/local-agent-runtime.ts, src/local-agent-runtime-pool.ts, src/local-agent-runtime.test.ts, src/local-agent-manager.test.ts |
LocalAgentDriver now requires runtimePolicy instead of runtimeKey and idleTimeoutMs. The pool derives runtime keys from provider instance, policy scope, and applicable workspace, agent, or authority values. Runtime and session idle timeouts use policy values when set, with existing defaults as fallbacks. Tests cover the keying rules and updated driver fixtures. |
Driver runtime policies src/local-agent-acp.ts, src/local-agent-claude.ts, src/local-agent-codex.ts, src/local-agent-opencode.ts, src/local-agent-pi.ts, src/local-agent-claude.test.ts, src/local-agent-adapters.test.ts |
The drivers replace standalone timeout and runtime-key declarations with policies. ACP uses workspace scope and write_mode authority; Claude uses agent scope and full_access_boundary; Codex and OpenCode use instance scope; Pi uses agent scope. Existing timeout values are retained. Tests assert the updated policy declarations. |
Provider registry construction src/local-agent-provider-registry.ts, src/local-agent-adapters.ts |
The new registry registers factories, rejects duplicate or missing driver kinds, provides environment inputs, and wraps created drivers. createLocalAgentDrivers now registers Codex, Claude, OpenCode, Pi, Cursor, Copilot, and Grok factories and delegates instance creation to the registry. |
Priority:
Estimated code review effort: 3 (Moderate) | ~25 minutes
Change: Refactor
Sequence Diagram(s)
sequenceDiagram
participant Caller
participant RuntimePool
participant LocalAgentDriver
Caller->>RuntimePool: acquire(driver, context)
RuntimePool->>LocalAgentDriver: read runtimePolicy
RuntimePool->>RuntimePool: derive runtime key from policy and context
RuntimePool->>LocalAgentDriver: createRuntime(context)
Possibly related PRs
- Waishnav/devspace#379: Introduces provider instance IDs and wrapper-based runtime-key partitioning, which this change continues with registry wrappers and policy-derived keys.
Merge Risk: 
c1295
-
No actionable merge-blocking risk was established for this change.
Security architecture risk: 
8a73f
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Existing execution paths preserve provider separation and permission controls. The change nevertheless makes isolation depend on a common policy and correctly aligned provider identities. Broader integration coverage remains limited; no introduced security vulnerability was established.
Retained concerns
No architecture-level concerns identified.Security review details
-
Security Blast Radius
- inferred — An isolation error here could affect provider credentials and local execution across agents sharing an instance-scoped runtime. Full-access execution already permits broader local authority. In the traced path, configured provider IDs, residency scope, and permission partitions bound reuse; deployment-wide or tenant-wide exposure is not established.
Trust Boundaries and Controls
- observed — Permission enforcement remains provider-specific rather than being replaced by pooling policy. Claude reapplies permission settings before submitting a prompt, Codex supplies sandbox policy per turn, and OpenCode selects permission-specific agents. ACP's policy separately partitions runtime reuse by write mode.
- observed — The new key takes provider identity from request context rather than the selected driver's configured identity. The manager keeps these aligned, but the public pool does not validate equality. A mismatched direct caller is an integration-contract gap, not a demonstrated attacker-controlled path in the inspected execution flow.
Resilience and Maintainability Implications
- inferred — Centralized key derivation makes provider policy declarations security-relevant: a future driver must distinguish creation-time authority from per-run authority and choose residency accordingly. The current built-in policies preserve the inspected boundaries, but the type contract alone cannot prove a new driver's declaration matches its enforcement behavior.
Hardening Proposals
- proposed — Consider deriving pool identity from the selected driver's configured instance ID, or rejecting driver/context identity mismatches before lookup. This would enforce the alignment currently supplied by the manager without treating hypothetical direct misuse as a verified vulnerability.
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Pre-merge checks: 
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Check name Status Explanation Resolution Docstring Coverage Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 6 functions across 13 files. Write docstrings for the functions missing them to satisfy the coverage threshold. -
Check name Status Explanation Description Check Check skipped - CodeRabbit’s high-level summary is enabled. Title check The title clearly and concisely identifies the two main changes: adding a driver registry and introducing runtime policy. Linked Issues check Check skipped because no linked issues were found for this pull request. Out of Scope Changes check Check skipped because no linked issues were found for this pull request.
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A rabbit checks the runtime key,
And sets the scope where agents roam.
The drivers share a policy,
The registry guides them to their home.
Five-minute clocks tick softly by,
Then carrots mark the passing day.
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Inline comments:
Review comments at @src/local-agent-runtime-pool.ts:
- Line 509: Update workspace runtime key construction in the workspace case to
use the stored workspaceId rather than workspaceRoot, falling back to agentId
when no workspace ID is available. Add workspaceId to LocalAgentRuntimeContext
and pass record.workspaceId when LocalAgentManager creates the runtime context.
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📒 Files selected for processing (13)
src/local-agent-acp.tssrc/local-agent-adapters.test.tssrc/local-agent-adapters.tssrc/local-agent-claude.test.tssrc/local-agent-claude.tssrc/local-agent-codex.tssrc/local-agent-manager.test.tssrc/local-agent-opencode.tssrc/local-agent-pi.tssrc/local-agent-provider-registry.tssrc/local-agent-runtime-pool.tssrc/local-agent-runtime.test.tssrc/local-agent-runtime.ts
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…rovider instance name A profile named like its provider instance won target resolution on start but was treated as a raw provider run on continue, dropping its instructions and its disabled check. Resolve the profile first on continue too. Also make the migrated local_agent_sessions.driver column NOT NULL so migrated databases enforce the same invariant as fresh ones. Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
A cached probe could keep routing new runtimes to the previous protocol generation after OpenCode was upgraded while the daemon stayed up. Runtime creation already spawns a server, so one extra --version call is negligible. Also report spawn failures other than ENOENT with their cause. Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
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… message OpenCode 2 records a turn that fails before any assistant output (for example an expired provider login) as a failed idle message. The assistant-only listing hid it and the run ended with a misleading protocol error. Read the failed idle message and surface its error. Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
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…stance Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
…e-v1-v2 Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
…stry Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
A continued v2 turn that fails before output no longer returns the previous turn's assistant message, and the version probe reads output after stdio closes rather than on exit. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
…or/subagent-driver-registry
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Summary
runtimeKey()strings with declarative runtime residency and authority policyValidation
pnpm typecheckpnpm test(149 passed, 1 skipped)pnpm buildStacked on #380.
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