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mj

Drive Mjolnir coding sessions from inside an agent. Use when you need to start another coding session, send it a prompt, wait for its turn to end, read its transcript, look at its diff, export its work, or close it, and when you need to check whether the Mjolnir daemon is healthy

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Price unconfirmed★ 71 GitHub starsRegistry updated · Oct 1, 2026agent-skill

Overview

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Drive Mjolnir sessions

Mjolnir (mj) runs coding sessions on local or remote targets. This skill is how you, an agent running inside one session, start and steer other sessions.

Check availability first

command -v mj
mj api-info

mj api-info prints the API base URL and the file holding the bearer token. Both commands must succeed. They often fail inside containers and on remote targets, because the worker there cannot reach the daemon on the user's machine.

When mj is unusable, use the mj-agents MCP tools if your harness lists them. When neither is available, say once that session orchestration is not reachable from here, and continue with the task by yourself.

The mj-agents MCP server

Some sessions are given an MCP server named mj-agents. It delegates work to child sessions in the same target and filesystem:

list_profiles — the profiles and models a child may use.
spawn — start a child; returns child_session_id at once, before the child has started running.
list_agents — this parent's children and their status.
send_input — durably queue follow-up input to one child, including while it starts. The queue receipt is not delivery confirmation; do not resend it. wait and list_agents show pending input and delivery failures.
wait — block until the named children finish their current turn. Omit child_session_ids to wait for every child that is still running. Status complete means the reports are in output; still_running means the timeout came first. That is not a failure: call wait again with the same child_session_ids.
interrupt — stop only the child's current turn. With no active turn it returns immediately; queued input remains queued.
close — stop a child and keep its conversation.

Prefer these tools when they are listed; they work where the CLI cannot reach the daemon.

Commands

Every command takes --json and then prints the API response unchanged. A session is named with --session <id>. For the flags of any command, append --help to it rather than guessing.

Sessions and workspaces:

mj workspaces list — the workspaces a session can be created in.
mj workspaces create — create a workspace, or select the existing one with that name.
mj sessions — the sessions the daemon holds; add --session for one.
mj new — create a session with a first prompt and print its id.
mj suspend — save a recovery copy and release the environment for Resume.
mj destroy — permanently remove a session, its environment, and recovery archive; --delete-branch also removes its managed branch.
mj resume — continue a session that was suspended. It keeps its id, its transcript, and its work.

Running a turn:

mj prompt — send a prompt; --wait also waits for the turn to end.
mj wait — block until the turn ends and print the outcome, the turn number, the elapsed time, and the agent's final message.
mj interrupt-turn — interrupt the current turn while keeping the environment.
mj set-config — apply a session configuration setting, such as the model.
mj models — the models and efforts a profile offers.

Reading a session:

mj transcript — page the transcript; --after-seq returns only what is new.
mj events — follow durable session events as line-delimited JSON.
mj usage — recorded token usage and coverage.
mj elicitations — structured input requests a session is waiting on.
mj respond — answer one of those requests.

Moving work in and out:

mj diff — unified diff of the session's work.
mj export — the work as a patch, a pushed branch, a git bundle, or one file.
mj put-file — upload one file into an idle session's workspace.

Diagnosis:

mj doctor — platform and configuration prerequisites.
mj daemon status — daemon PID, version, start time, and client count.

A delegation, end to end

mj workspaces create delegated
id=$(mj new --workspace delegated --profile work --target local --json "Port the parser to the new API" | jq -r .session_id)
mj wait --session "$id" --timeout 900
mj diff --session "$id"
mj suspend --session "$id"

mj new prints the id, mj wait blocks until the turn ends, and mj prompt --wait does both for every prompt after the first. A prompt comes from the positional argument, from --prompt-file, or from standard input when the argument is -.

Rules

Read the session's own output before reporting on it. mj wait gives you the agent's final message; mj diff gives you what actually changed.
One session, one job. Give a child a self-contained task and a way to report.
A session that has work in it is not disposable: mj destroy permanently removes its environment and recovery archive. Prefer mj suspend. Keeping a managed branch does not preserve work held only in the environment.
Report the session id in anything you tell the user, so they can open it.

View source ↗

File metadata

name: mj
description: Drive Mjolnir coding sessions from inside an agent. Use when you need to start another coding session, send it a prompt, wait for its turn to end, read its transcript, look at its diff, export its work, or close it, and when you need to check whether the Mjolnir daemon is healthy.

View original text

---
name: mj
description: Drive Mjolnir coding sessions from inside an agent. Use when you need to start another coding session, send it a prompt, wait for its turn to end, read its transcript, look at its diff, export its work, or close it, and when you need to check whether the Mjolnir daemon is healthy.
---

# Drive Mjolnir sessions

Mjolnir (`mj`) runs coding sessions on local or remote targets. This skill is
how you, an agent running inside one session, start and steer other sessions.

## Check availability first

```sh
command -v mj
mj api-info
```

`mj api-info` prints the API base URL and the file holding the bearer token.
Both commands must succeed. They often fail inside containers and on remote
targets, because the worker there cannot reach the daemon on the user's
machine.

When `mj` is unusable, use the `mj-agents` MCP tools if your harness lists
them. When neither is available, say once that session orchestration is not
reachable from here, and continue with the task by yourself.

## The mj-agents MCP server

Some sessions are given an MCP server named `mj-agents`. It delegates work to
child sessions in the same target and filesystem:

- `list_profiles` — the profiles and models a child may use.
- `spawn` — start a child; returns `child_session_id` at once, before the child
has started running.
- `list_agents` — this parent's children and their status.
- `send_input` — durably queue follow-up input to one child, including while it
starts. The queue receipt is not delivery confirmation; do not resend it.
`wait` and `list_agents` show pending input and delivery failures.
- `wait` — block until the named children finish their current turn. Omit
`child_session_ids` to wait for every child that is still running. Status
`complete` means the reports are in `output`; `still_running` means the
timeout came first. That is not a failure: call `wait` again with the same
`child_session_ids`.
- `interrupt` — stop only the child's current turn. With no active turn it
returns immediately; queued input remains queued.
- `close` — stop a child and keep its conversation.

Prefer these tools when they are listed; they work where the CLI cannot reach
the daemon.

## Commands

Every command takes `--json` and then prints the API response unchanged. A
session is named with `--session <id>`. For the flags of any command, append
`--help` to it rather than guessing.

Sessions and workspaces:

- `mj workspaces list` — the workspaces a session can be created in.
- `mj workspaces create` — create a workspace, or select the existing one with
that name.
- `mj sessions` — the sessions the daemon holds; add `--session` for one.
- `mj new` — create a session with a first prompt and print its id.
- `mj suspend` — save a recovery copy and release the environment for Resume.
- `mj destroy` — permanently remove a session, its environment, and recovery archive; `--delete-branch` also removes its managed branch.
- `mj resume` — continue a session that was suspended. It keeps its id, its
transcript, and its work.

Running a turn:

- `mj prompt` — send a prompt; `--wait` also waits for the turn to end.
- `mj wait` — block until the turn ends and print the outcome, the turn number,
the elapsed time, and the agent's final message.
- `mj interrupt-turn` — interrupt the current turn while keeping the environment.
- `mj set-config` — apply a session configuration setting, such as the model.
- `mj models` — the models and efforts a profile offers.

Reading a session:

- `mj transcript` — page the transcript; `--after-seq` returns only what is new.
- `mj events` — follow durable session events as line-delimited JSON.
- `mj usage` — recorded token usage and coverage.
- `mj elicitations` — structured input requests a session is waiting on.
- `mj respond` — answer one of those requests.

Moving work in and out:

- `mj diff` — unified diff of the session's work.
- `mj export` — the work as a patch, a pushed branch, a git bundle, or one file.
- `mj put-file` — upload one file into an idle session's workspace.

Diagnosis:

- `mj doctor` — platform and configuration prerequisites.
- `mj daemon status` — daemon PID, version, start time, and client count.

## A delegation, end to end

```sh
mj workspaces create delegated
id=$(mj new --workspace delegated --profile work --target local --json "Port the parser to the new API" | jq -r .session_id)
mj wait --session "$id" --timeout 900
mj diff --session "$id"
mj suspend --session "$id"
```

`mj new` prints the id, `mj wait` blocks until the turn ends, and
`mj prompt --wait` does both for every prompt after the first. A prompt comes
from the positional argument, from `--prompt-file`, or from standard input when
the argument is `-`.

## Rules

- Read the session's own output before reporting on it. `mj wait` gives you the
agent's final message; `mj diff` gives you what actually changed.
- One session, one job. Give a child a self-contained task and a way to report.
- A session that has work in it is not disposable: `mj destroy` permanently removes
its environment and recovery archive. Prefer `mj suspend`. Keeping a managed
branch does not preserve work held only in the environment.
- Report the session id in anything you tell the user, so they can open it.

Review the source

Price & running costs

Get the skill: Price unconfirmed
Run it: Requirements have not been confirmed. Check the source for agent, API and service charges.
License: GPL-3.0
Price unconfirmed: We have not confirmed a price for this skill. Existing source and install links remain available.

Free to get does not mean free to run. Price labels are not safety ratings. Submit pricing information →

Source needs review

The tracked source changed or could not be synchronized. Review the current source before installing.

Review before install: Avoid automatic install

License: GPL-3.0

Dependency or permission surface needs review
Permission surface may require sandboxing
AI review approval is missing
Quality score needs review
Permission surface needs review: secrets or environment access, shell or command execution
GitHub adoption: 71 GitHub stars
Stars/forks activity: 71 stars, 8 forks; issue activity unavailable in current metadata
Dependency/runtime risk: command execution surface, credential or environment access
Permission surface: secrets or environment access, shell or command execution
Review status: AI review approval is missing

Open full audit

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Start with one small task

1Read the source. Confirm the input, expected output, dependencies and permissions.
2Ask your agent for a plan. Approve setup and any costs before running a small isolated test.
3Check the output and changed files. Report only what actually ran; keep the source revision for reproduction.

Check the source for dependencies, API keys and third-party costs. A public repository does not mean every service is free.

Source & usage notes

Indexed

Repository metadata and review signals are advisory. Popularity, source discovery and successful execution are different facts.

Source repository: BrokkAi/mjolnir
License: GPL-3.0
Version: Unknown
Last GitHub push: Sep 30, 2026
Registry updated: Oct 1, 2026
Instruction path: mj-core/assets/skills/mj/SKILL.md @ 8d98fe6a61f1

Version reported in registry metadata; check source releases before relying on it.

Quality

60/100

Promising

Trust

61/100

Sandbox only

Audit

74/100

Needs review

Open full audit View eval report

Dependency or permission surface needs review
Permission surface may require sandboxing
AI review approval is missing
Quality score needs review
Permission surface needs review: secrets or environment access, shell or command execution
GitHub adoption: 71 GitHub stars
Stars/forks activity: 71 stars, 8 forks; issue activity unavailable in current metadata
Dependency/runtime risk: command execution surface, credential or environment access
Permission surface: secrets or environment access, shell or command execution
Review status: AI review approval is missing

Verified installs: —
Outcomes: —

Copies are not installs. Installation counts require a reported successful installation; they are not a blanket quality guarantee.

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This page exposes the same decision, trust, audit, use-case, and install signals through the Registry API, so agents can rank this skill without scraping the UI.

Open install API LLM text format Open manifest Auto-resolve Plan

More details

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Creator: BrokkAi
Source: BrokkAi/mjolnir
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Price unconfirmed★ 71 GitHub starsRegistry updated · Oct 1, 2026agent-skill

Overview

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Source documentation, not instructions for this website. Review permissions before running any commands.

Drive Mjolnir sessions

Mjolnir (mj) runs coding sessions on local or remote targets. This skill is how you, an agent running inside one session, start and steer other sessions.

Check availability first

command -v mj
mj api-info

The mj-agents MCP server

Some sessions are given an MCP server named mj-agents. It delegates work to child sessions in the same target and filesystem:

list_profiles — the profiles and models a child may use.
spawn — start a child; returns child_session_id at once, before the child has started running.
list_agents — this parent's children and their status.
send_input — durably queue follow-up input to one child, including while it starts. The queue receipt is not delivery confirmation; do not resend it. wait and list_agents show pending input and delivery failures.
wait — block until the named children finish their current turn. Omit child_session_ids to wait for every child that is still running. Status complete means the reports are in output; still_running means the timeout came first. That is not a failure: call wait again with the same child_session_ids.
interrupt — stop only the child's current turn. With no active turn it returns immediately; queued input remains queued.
close — stop a child and keep its conversation.

Prefer these tools when they are listed; they work where the CLI cannot reach the daemon.

Commands

Every command takes --json and then prints the API response unchanged. A session is named with --session <id>. For the flags of any command, append --help to it rather than guessing.

Sessions and workspaces:

mj workspaces list — the workspaces a session can be created in.
mj workspaces create — create a workspace, or select the existing one with that name.
mj sessions — the sessions the daemon holds; add --session for one.
mj new — create a session with a first prompt and print its id.
mj suspend — save a recovery copy and release the environment for Resume.
mj destroy — permanently remove a session, its environment, and recovery archive; --delete-branch also removes its managed branch.
mj resume — continue a session that was suspended. It keeps its id, its transcript, and its work.

Running a turn:

mj prompt — send a prompt; --wait also waits for the turn to end.
mj wait — block until the turn ends and print the outcome, the turn number, the elapsed time, and the agent's final message.
mj interrupt-turn — interrupt the current turn while keeping the environment.
mj set-config — apply a session configuration setting, such as the model.
mj models — the models and efforts a profile offers.

Reading a session:

mj transcript — page the transcript; --after-seq returns only what is new.
mj events — follow durable session events as line-delimited JSON.
mj usage — recorded token usage and coverage.
mj elicitations — structured input requests a session is waiting on.
mj respond — answer one of those requests.

Moving work in and out:

mj diff — unified diff of the session's work.
mj export — the work as a patch, a pushed branch, a git bundle, or one file.
mj put-file — upload one file into an idle session's workspace.

Diagnosis:

mj doctor — platform and configuration prerequisites.
mj daemon status — daemon PID, version, start time, and client count.

A delegation, end to end

mj workspaces create delegated
id=$(mj new --workspace delegated --profile work --target local --json "Port the parser to the new API" | jq -r .session_id)
mj wait --session "$id" --timeout 900
mj diff --session "$id"
mj suspend --session "$id"

Rules

Read the session's own output before reporting on it. mj wait gives you the agent's final message; mj diff gives you what actually changed.
One session, one job. Give a child a self-contained task and a way to report.
A session that has work in it is not disposable: mj destroy permanently removes its environment and recovery archive. Prefer mj suspend. Keeping a managed branch does not preserve work held only in the environment.
Report the session id in anything you tell the user, so they can open it.

View source ↗

File metadata

name: mj
description: Drive Mjolnir coding sessions from inside an agent. Use when you need to start another coding session, send it a prompt, wait for its turn to end, read its transcript, look at its diff, export its work, or close it, and when you need to check whether the Mjolnir daemon is healthy.

View original text

# Drive Mjolnir sessions

Mjolnir (`mj`) runs coding sessions on local or remote targets. This skill is
how you, an agent running inside one session, start and steer other sessions.

## Check availability first

```sh
command -v mj
mj api-info
```

## The mj-agents MCP server

Some sessions are given an MCP server named `mj-agents`. It delegates work to
child sessions in the same target and filesystem:

Prefer these tools when they are listed; they work where the CLI cannot reach
the daemon.

## Commands

Every command takes `--json` and then prints the API response unchanged. A
session is named with `--session <id>`. For the flags of any command, append
`--help` to it rather than guessing.

Sessions and workspaces:

Running a turn:

Reading a session:

Moving work in and out:

Diagnosis:

- `mj doctor` — platform and configuration prerequisites.
- `mj daemon status` — daemon PID, version, start time, and client count.

## A delegation, end to end

## Rules

Review the source

Price & running costs

Get the skill: Price unconfirmed
Run it: Requirements have not been confirmed. Check the source for agent, API and service charges.
License: GPL-3.0
Price unconfirmed: We have not confirmed a price for this skill. Existing source and install links remain available.

Free to get does not mean free to run. Price labels are not safety ratings. Submit pricing information →

Source needs review

The tracked source changed or could not be synchronized. Review the current source before installing.

Review before install: Avoid automatic install

License: GPL-3.0

Dependency or permission surface needs review
Permission surface may require sandboxing
AI review approval is missing
Quality score needs review
Permission surface needs review: secrets or environment access, shell or command execution
GitHub adoption: 71 GitHub stars
Stars/forks activity: 71 stars, 8 forks; issue activity unavailable in current metadata
Dependency/runtime risk: command execution surface, credential or environment access
Permission surface: secrets or environment access, shell or command execution
Review status: AI review approval is missing

Open full audit

Listed tools are metadata hints, not tested compatibility. Agent prompts are suggested handoffs.

Start with one small task

1Read the source. Confirm the input, expected output, dependencies and permissions.
2Ask your agent for a plan. Approve setup and any costs before running a small isolated test.
3Check the output and changed files. Report only what actually ran; keep the source revision for reproduction.

Check the source for dependencies, API keys and third-party costs. A public repository does not mean every service is free.

Source & usage notes

Indexed

Repository metadata and review signals are advisory. Popularity, source discovery and successful execution are different facts.

Source repository: BrokkAi/mjolnir
License: GPL-3.0
Version: Unknown
Last GitHub push: Sep 30, 2026
Registry updated: Oct 1, 2026
Instruction path: mj-core/assets/skills/mj/SKILL.md @ 8d98fe6a61f1

Version reported in registry metadata; check source releases before relying on it.

Quality

60/100

Promising

Trust

61/100

Sandbox only

Audit

74/100

Needs review

Open full audit View eval report

Dependency or permission surface needs review
Permission surface may require sandboxing
AI review approval is missing
Quality score needs review
Permission surface needs review: secrets or environment access, shell or command execution
GitHub adoption: 71 GitHub stars
Stars/forks activity: 71 stars, 8 forks; issue activity unavailable in current metadata
Dependency/runtime risk: command execution surface, credential or environment access
Permission surface: secrets or environment access, shell or command execution
Review status: AI review approval is missing

Verified installs: —
Outcomes: —

Copies are not installs. Installation counts require a reported successful installation; they are not a blanket quality guarantee.

Agent access

This page exposes the same decision, trust, audit, use-case, and install signals through the Registry API, so agents can rank this skill without scraping the UI.

Open install API LLM text format Open manifest Auto-resolve Plan

More details

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    "reviewed_at": "2026-09-30T06:46:15.822Z",
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        "id": "cursor",
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        "kind": "agent-prompt",
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For the creator

Listing source

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Creator: BrokkAi
Source: BrokkAi/mjolnir
Indexed by: OpenAgentSkill community index

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Overview

Drive Mjolnir sessions

Check availability first

The mj-agents MCP server

Commands

A delegation, end to end

Rules

Review the source

Price & running costs

Start with one small task

Source & usage notes

Agent access

Related skills

For the creator

Registry indexed

Claim this skill listing

Add the evidence badges to your README

Community signal

Overview

Drive Mjolnir sessions

Check availability first

The mj-agents MCP server

Commands

A delegation, end to end

Rules

Review the source

Price & running costs

Start with one small task

Source & usage notes

Agent access

Related skills

For the creator

Registry indexed

Claim this skill listing

Add the evidence badges to your README

Community signal