II.CapabilityProfile overviewcapability-profile:a5c.default
Reference · live a5c (default) overview
Default capability profile for the a5c agent (the babysitter monorepo).
a5c is a harness-agnostic orchestration substrate: it does not host its
own model loop directly, instead delegating model interaction to a
bridged backend harness (Claude Code, Codex, Gemini, OpenCode, etc.) via
adapters. Its native capabilities are orchestration primitives —
multi-harness mediation, PID-scoped session binding, journal-based
effect/breakpoint mediation, and skill/plugin/process composition —
rather than direct model-loop capabilities. Capabilities the bridged
backend exposes (streaming, tool-use, thinking) are advertised through
the AgentCoreImpl/AgentRuntimeImpl `supports` edges, not duplicated here.
Source citations:
- packages/babysitter-sdk/src/runtime/replay/effectIndex.ts (journal event types
EFFECT_REQUESTED / EFFECT_RESOLVED / EFFECT_PROGRESS / EFFECT_CANCELLED
/ RUN_CREATED / RUN_COMPLETED / RUN_FAILED / COST_TRACKED).
- packages/babysitter-sdk/src/cli/main/usage.ts (--interactive / --non-interactive
/ yolo CLI flags).
- packages/babysitter-sdk/src/cli/commands/instructions.ts (PID-scoped AGENT_SESSION_ID
marker semantics).
- packages/adapters (multi-harness mediation runtime).
CapabilityProfileOutgoing · 1Incoming · 0
Attributes
agentVersionId
displayName
a5c (default)
default
true
description
Default capability profile for the a5c agent (the babysitter monorepo).
a5c is a harness-agnostic orchestration substrate: it does not host its
own model loop directly, instead delegating model interaction to a
bridged backend harness (Claude Code, Codex, Gemini, OpenCode, etc.) via
adapters. Its native capabilities are orchestration primitives —
multi-harness mediation, PID-scoped session binding, journal-based
effect/breakpoint mediation, and skill/plugin/process composition —
rather than direct model-loop capabilities. Capabilities the bridged
backend exposes (streaming, tool-use, thinking) are advertised through
the AgentCoreImpl/AgentRuntimeImpl `supports` edges, not duplicated here.
Source citations:
- packages/babysitter-sdk/src/runtime/replay/effectIndex.ts (journal event types
EFFECT_REQUESTED / EFFECT_RESOLVED / EFFECT_PROGRESS / EFFECT_CANCELLED
/ RUN_CREATED / RUN_COMPLETED / RUN_FAILED / COST_TRACKED).
- packages/babysitter-sdk/src/cli/main/usage.ts (--interactive / --non-interactive
/ yolo CLI flags).
- packages/babysitter-sdk/src/cli/commands/instructions.ts (PID-scoped AGENT_SESSION_ID
marker semantics).
- packages/adapters (multi-harness mediation runtime).
overrides
capability:supports-tool-use
enabled
true
level
full
note
Delegated through adapters to whichever harness the run is bound to.
capability:supports-mcp
enabled
true
level
full
note
a5c platform exposes stdio, streamable-http, and http-sse MCP
transports (see agent-runtime-impl:a5c.runtime@current.connects).
capability:streaming
enabled
true
level
full
note
a5c-unified-transport normalizes streaming across bridged harnesses.
capability:supports-plugins
enabled
true
level
full
note
Native a5c-plugin descriptor; see agent-platform-impl:a5c.platform@current.
capability:supports-custom-subagents
enabled
true
level
full
note
Subagents declared via defineTask() in JS/TS or claude-code-md format.
capability:can-resume
enabled
true
level
full
note
Sessions persist via AGENT_SESSION_ID PID-scoped marker plus harness
env file; orchestrator re-binds on resume.
capability:can-fork
enabled
true
level
full
note
Subagent dispatch creates ephemeral child sessions
(subagentChildSessionPolicy=ephemeral-child-session).
capability:requires-tool-approval
enabled
true
level
full
note
Default mode (--interactive) gates tool execution behind operator
approval / breakpoint mediation. yolo / --non-interactive bypasses.