Documentation: issue-34

Capability docs

Capability doc	What changed	History row
`remote-agents.md`	The agents roster built at startup (fields, cleaning, caps, logs). `spawn_subtask` refuses an unknown agent. Design link.	issue-34
`context-window.md`	The static, never-compacted `agents` section in the declared order and in the compaction keep-set	issue-34
`prompts-and-skills.md`	The default system prompt has seven sections. What the `agents` section tells the model	issue-34
`configuration.md`	`[card]` and its validation (R5, added in review)	issue-34
`a2a-server.md`	The card's name, description, version and skills come from `[card]` (R5); a new task built from its creator's brief, trusted delegators, participant mode and a brief-only start (R7)	issue-34
`tasks-and-plans.md`	Every child is an A2A task on its agent; rows name the child's task; a delegated parent reads an unread result (R7)	issue-34

Page	Reader	What changed
`docs/configuration/plugins-and-agents.md`	CLI and SDK users	New "What the agent sees" section under `agents`: which card values the agent reads, why a clear description matters, the URL is never shown, cleaning and limits, and the error for an unlisted agent.
`docs/sdk/extend.md`	SDK users	"Change the system prompt" lists the new `agents` section (seven sections, not six).
`docs/configuration/plugins-and-agents.md`	CLI and SDK users	New `[card]` section (R5): what it sets, defaults, an example, the validation. "What the agent sees" points a tiny-harness peer to it.
`docs/configuration/server.md`	CLI and SDK users	New `delegators` setting (R7).
`docs/configuration/index.md`	CLI and SDK users	The sections table names `[card]`.
`docs/sdk/example-delegation.md`	SDK and CLI users	New guide (R6): run two agents, what you see, a sequence diagram, the files. In the SDK sidebar.
`examples/delegation/README.md`	Repository readers	The commands to run the example, and a link to the guide (R6).
`docs/a2a/ext/intrinsics/spawn_subtask.json`	A2A integrators	Generated schema: the `agent` description now points to the `agents` list. Regenerated by the contract test, not edited by hand.

README.md and docs/cli/ do not describe sub-agents, so this change does not make them wrong. They are unchanged.