Claude Code Plugin

Claude Code plugin

clauth ships an MCP server that hands your profiles to a live Claude Code session: compare usage across accounts, relink the active one, or hand a whole prompt to another account without spending the window you are in.

Install

In Claude Code:

/plugin marketplace add uwuclxdy/clauth
/plugin install clauth@clauth

Claude Code launches clauth mcp in the background for the session's lifetime. clauth has to be on PATH, which it is after any standard install.

To wire the server by hand instead, add this to mcpServers in ~/.claude.json:

"clauth": { "type": "stdio", "command": "clauth", "args": ["mcp"] }

The TUI's Plugin tab writes exactly that entry for you with f. The manual route gives you the same five tools, minus the bundled hook that delivers backgrounded delegate results on its own: without the plugin, the session has to poll delegate_result.

Tools

Tool	Input	Returns	Cost
list_profiles	none	every profile with cached 5h / 7d percentages, provider, tier, active flag, live-session flag, observed throughput	none, reads the disk cache
which	none	the profile owning this session's credentials, its plan, its throughput	none
switch	name	relinks the global active profile	none
delegate	see below	the target account's answer, or a job_id	a real usage window on the target account
delegate_result	job_id, wait_secs (0-60, default 0)	a backgrounded job's envelope, or its running status	none

which is the authority on which account owns the current session. list_profiles reads a cache and can lag it.

switch inside a session

switch repoints the global ~/.claude credentials. A session running on those adopts the new account at its next token refresh, mid-task. A clauth start session runs against its own profile and is unaffected.

To use another account without disturbing the current session, use delegate.

delegate

Runs a headless claude -p under another profile and returns what it produced.

Field	Type	Default
profile	string	required
prompt	string	required
model	string	the profile's own default
cwd	string	the server's working directory
env	object	none
args	array	none, appended to the claude invocation
idle_secs	int	300, max 3600
timeout_secs	int	3600, max 3600
resume	string	none, a session id
isolated	bool	false
background	bool	false
monitor	bool	false

Cost. A delegate to a subscription account opens a real 5-hour window there. To an API-key account it bills real money. Call list_profiles first to pick the account with headroom.

What it sees. Only the prompt you pass. It has no view of the calling conversation, so the prompt has to carry the whole task.

Recursion. Hard-capped at depth 1. A delegated session cannot call delegate again.

Kill rules. It dies once nothing has arrived for idle_secs, or once timeout_secs of wall clock passes, whichever comes first. A long run that keeps producing output is never cut off. A killed run still returns the text it had written, in partial_result, along with timed_out, elapsed_secs, and a session_id when the work is resumable.

Resume. Pass a killed run's session_id back as resume rather than paying for the work again. clauth runs the resume in the workspace that session was recorded in, and refuses a cwd that disagrees with it. A shared delegate is always resumable; an isolated one needs auto_rescue on, since its throwaway runtime is deleted at teardown otherwise.

Isolated. isolated: true drops your operator memory, plugins, hooks, and every MCP server, keeping the account's auth. Good for blind runs and evals.

Background. background: true returns a job_id immediately so the session keeps working. With the plugin installed, a bundled PostToolUse hook delivers the result as soon as the job finishes. Otherwise call delegate_result with the job_id, optionally long-polling up to 60 s. Jobs live in ~/.clauth/jobs/, swept an hour after they finish.

Permissions. A delegate spawns with Claude Code's permission gate armed and nobody to answer it, so a task that writes files fails on a denial rather than doing the work. Pass the permission flag through args when the delegate is meant to edit anything, and add --add-dir for reads outside cwd. Denials come back in a permission_denials array, so check that field rather than the prose result.

Throughput. clauth records observed tokens/sec per model per profile and flags an account as degraded or recently rate-limited in list_profiles and which. Subscription throttling is per model and absent from the usage snapshot, so this is the only signal for it.

What the server tells the model

On connect it sends a short brief: the five tools, their cost model, what switch would do to this specific session, a reminder that a delegate sees only its prompt, and a roster of your profiles as of session start. Live usage numbers are deliberately left out of that snapshot, since they go stale immediately. list_profiles is the live read.