opencode subagents
NPM · OPENCODE-SUBAGENT-MCP · SCANNED OCT 3
Run Claude Code subagents on cheaper opencode models (DeepSeek, opencode Go) with native parity.
Available components
How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. How we score → Why this is hard to score →
Supply Chain Security98
- No malware found by supply-chain analysis.Pass
- No known CVEs affecting this package version or its production dependencies.Pass
- No install/post-install scripts declared.Pass
- 31 of 92 dependencies flagged as unhealthy. View diagnostics → Partial
Provenance & Transparency97
- Source repository is publicly reachable at the declared URL. View diagnostics → Pass
- Cryptographically verified build provenance (signed, bound to sebstaq/opencode-subagent-mcp). View diagnostics → Pass
- Clear OSI-approved license (MIT).Pass
- Actively maintained (last published 5 days ago).Pass
- Disclosure check failed: no security disclosure policy was found in the source repository. See how to fix → Fail
Schema Quality & AI Usability66
- AI-judged instruction clarity (good).Pass
- Context-footprint check failed: tool/resource definitions use about 705 tokens (~141/item across 5 items; 5 tools + 0 resources), over budget; trim descriptions and params. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management23
- Stability observed for 7 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage83
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 48% of tool parameters carry a description.Partial
Tool Safety75
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- 0 of 1 tool(s) whose name or description implies an irreversible operation declare an MCP destructiveHint annotation; "send_message" implies "send" and declares no destructiveHint at all, which the MCP spec reads as destructive by default. See how to fix → Fail
- An AI judge read all 6 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
How do I install the opencode subagents MCP server?
opencode subagents runs locally as an npm package, launched with npx -y opencode-subagent-mcp. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
npm · opencode-subagent-mcp
claude mcp add sebstaq-opencode-subagent-mcp -- npx -y opencode-subagent-mcp
{
"mcpServers": {
"sebstaq-opencode-subagent-mcp": {
"command": "npx",
"args": [
"-y",
"opencode-subagent-mcp"
]
}
}
} {
"servers": {
"sebstaq-opencode-subagent-mcp": {
"command": "npx",
"args": [
"-y",
"opencode-subagent-mcp"
]
}
}
} codex mcp add sebstaq-opencode-subagent-mcp -- npx -y opencode-subagent-mcp
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"sebstaq-opencode-subagent-mcp": {
"type": "local",
"command": [
"npx",
"-y",
"opencode-subagent-mcp"
],
"enabled": true
}
}
} openclaw mcp add sebstaq-opencode-subagent-mcp --command npx --arg -y --arg opencode-subagent-mcp
mcp_servers:
sebstaq-opencode-subagent-mcp:
command: "npx"
args: ["-y", "opencode-subagent-mcp"] {
"McpServers": {
"sebstaq-opencode-subagent-mcp": {
"Transport": "stdio",
"Command": "npx",
"Arguments": [
"-y",
"opencode-subagent-mcp"
]
}
}
} assistant mcp add sebstaq-opencode-subagent-mcp -t stdio -c npx -a -y opencode-subagent-mcp
{
"mcpServers": {
"sebstaq-opencode-subagent-mcp": {
"command": "npx",
"args": [
"-y",
"opencode-subagent-mcp"
]
}
}
} Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 2 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 17 to 20. That category is still filling its 30-day observation window: 5 days of observed history at the previous scan, 6 at this one. The score rises as the window fills, whether or not the server changes.
- 30 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 10 to 13. That category is still filling its 30-day observation window: 3 days of observed history at the previous scan, 4 at this one. The score rises as the window fills, whether or not the server changes.
- 28 Sept 26 +1
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 27 Sept 26 +10
- Known CVEs: unverified → pass ▲ security
- Schema quality: 123 → 141 ▼ functional
- Stability: unverified → 0.03 ▲ functional
- Dependency health: unverified → 0.85 ▲ functional
- Package version: 0.1.2 → 0.1.3 functional
- 26 Sept 26 66
First indexed and scored.
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 3 Oct 2026 · Analysed npm/opencode-subagent-mcp@0.1.3
Provenance Verified
A signed build attestation was found and verified, binding this exact artifact to the source repository it claims to come from.
| Result | Verified |
|---|---|
| Ecosystem | npm |
| Reason | Verified |
| Discovered via | Registry attestation endpoint |
| Source repo | sebstaq/opencode-subagent-mcp |
| Certificate issuer | https://token.actions.githubusercontent.com |
| Certificate SAN | https://github.com/sebstaq/opencode-subagent-mcp/.github/workflows/release.yml@refs/tags/v0.1.3 |
| Rekor log index | 2975300926 |
| Predicate type | SLSA build provenance https://slsa.dev/provenance/v1 |
| Subject digest | sha512:e0b582bcdb181d4812746936e4d775c84681441a4eb67a8806f56b8679217a460b72349f4bfd0b7f48e1a97086d3af5f8e421f18ebd77a1c45eb347ae |
Background: How many MCP packages publish verified provenance →
Dependencies 92 packages
| Packages resolved | 92 |
|---|---|
| Stale | 31 |
| Tree resolution | Complete |
Background: SBOMs and build attestations, explained →
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
agent opencode subagent ~364
Launch a subagent that runs on an opencode model (default opencode-go/deepseek-v4.1-flash) in the current project. Mirrors the built-in Agent tool: give a self-contained task prompt; the agent starts with no conversation context and returns only its final report. subagent_type accepts Claude agent definitions from .claude/agents/ (their prompt, tools, permissionMode and maxTurns apply) or opencode agents (general, explore, plan, build). isolation 'worktree' runs it in a temporary git worktree off the default branch, removed if unchanged. The call blocks until the agent finishes (it is backgrounded automatically after a while); set run_in_background to return at once and collect the result with wait.
| Name | Type | Req | Description |
|---|---|---|---|
| cwd | string | – | Working directory (default: the project directory) |
| description | string | yes | Short (3-5 word) description of the task |
| disallowed_tools | array | – | – |
| effort | string | – | Model variant/reasoning effort, e.g. low, high, max |
| isolation | string | – | – |
| max_turns | integer | – | – |
| model | string | – | opencode model as provider/model (default: opencode-go/deepseek-v4.1-flash) |
| output_schema | object | – | JSON Schema the final answer must satisfy; returned as structured output |
| permission_mode | string | – | Permission mode (default: auto) |
| prompt | string | yes | The task for the agent to perform |
| run_in_background | boolean | – | – |
| subagent_type | string | – | Claude agent definition name or opencode agent name (default: general) |
| tools | array | – | Allowlist of tools (Claude or opencode names) |
No output schema declared.
No examples provided.
list List opencode subagents ~62
List this session's opencode subagents and the available agent types. It shows agents started or used since this MCP server started; agents from before a restart are not listed but their agent_id still works with wait, send_message and stop.
| Name | Type | Req | Description |
|---|---|---|---|
| cwd | string | – | – |
No output schema declared.
No examples provided.
send_message Continue an opencode subagent ~111
Send a follow-up message to a finished opencode subagent by agent_id. It resumes with its full previous history (and its worktree, if one was kept) and returns its new final report. Also works for agent_ids from before a restart of the MCP server or Claude Code session, and for agents that were interrupted by such a restart.
| Name | Type | Req | Description |
|---|---|---|---|
| agent_id | string | yes | – |
| max_turns | integer | – | – |
| message | string | yes | – |
| run_in_background | boolean | – | – |
No output schema declared.
No examples provided.
stop Stop an opencode subagent ~43
Abort a running opencode subagent. Returns what it produced so far. agent_ids from before a restart of the MCP server still work.
| Name | Type | Req | Description |
|---|---|---|---|
| agent_id | string | yes | – |
No output schema declared.
No examples provided.
wait Wait for an opencode subagent ~54
Wait for a background opencode subagent and return its result. agent_ids from before a restart of the MCP server still work.
| Name | Type | Req | Description |
|---|---|---|---|
| agent_id | string | yes | – |
| timeout_seconds | number | – | Return early if still running |
No output schema declared.
No examples provided.
What is the opencode subagents MCP server?
opencode subagents is an MCP server listed in the public MCP registry as io.github.sebstaq/opencode-subagent-mcp. Run Claude Code subagents on cheaper opencode models (DeepSeek, opencode Go) with native parity. This page covers its npm package (opencode-subagent-mcp).
Is the opencode subagents MCP server safe to use?
opencode subagents scores 79 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 3 October 2026. It declares no install or post-install scripts. Its build provenance is signed and verified. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the opencode subagents MCP server expose?
opencode subagents exposes 5 tools: agent, send_message, wait, stop, list. Their descriptions and schemas cost roughly 634 tokens of context every time the server is loaded.
Is the opencode subagents MCP server still maintained?
opencode subagents is still listed as active in the MCP registry. We last reached this channel on 3 October 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.
What licence is the opencode subagents MCP server under?
opencode subagents declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.