Subagents in Claude Code: specialise without creating chaos

When a subagent helps

A subagent suits bounded research, an independent review or work in a clearly owned domain. For one small linear change, delegation mostly adds coordination. Split work around outcomes that can be delivered independently.

Give one clear responsibility

Describe the intended result, allowed files, relevant context and verification. An assignment such as “find the cause and report evidence” prevents diagnosis from silently becoming implementation.

Restrict tools and permissions

A researcher usually does not need write access and a reviewer does not need deployment rights. Give each role only the tools its assignment requires and route risky actions through the main session or a person.

Use context isolation deliberately

A separate context keeps details out of the main session, but the subagent does not automatically know implicit decisions. Pass constraints, decisions and relevant paths explicitly.

No. Coordination, repeated context and conflicting changes can cost more than they save.

Design the hand-off

Request findings, changed files, checks performed and remaining uncertainty. The main agent should be able to verify and integrate the output without repeating the entire investigation.

Measure coordination cost

Compare lead time and mistakes with a simple execution. If roles often block one another or edit the same files, reduce parallelism. A higher agent count is not an outcome.

--- name: test-auditor description: Reviews test coverage only tools: Read, Grep, Bash --- Report evidence; do not edit production code.

Make Claude Code subagents verifiable

The decision review for Claude Code subagents first focuses on one bounded research or review task with a single owner, limited tools and a verifiable hand-off. Define the acceptable user outcome, essential inputs and authorised approver for Claude Code subagents before the trial starts. Keep the first Claude Code subagents trial small enough to separate causes from effects.

Build evidence for Claude Code subagents around one realistic successful route and also simulate overlapping file edits, missing decision context and tools broader than the delegated role. For every Claude Code subagents check, record the expected outcome, visible evidence and recovery action when it fails. The final decision question for Claude Code subagents is: “Are more subagents always faster?”

Claude Code subagents: from trial to everyday operation

Assign Claude Code subagents one operational owner, one subject reviewer and a clear fallback route. Treat the Claude Code subagents checklist as separate evidenced steps, so punctuation or phrasing never becomes part of the process logic. Ask the relevant user to complete Claude Code subagents without spoken help and record every point that still needs explanation or manual recovery.

Keep change rights, logging, support and review dates for Claude Code subagents in one operating plan. Repeat the Claude Code subagents trial after a change to source data, configuration, model, integration or user role. Expand Claude Code subagents only when the team can also detect, contain and recover overlapping file edits, missing decision context and tools broader than the delegated role.

Stop the Claude Code subagents rollout while overlapping file edits, missing decision context and tools broader than the delegated role is not reported visibly and recoverable by the assigned owner.