AgentIRC

Agent-friendly IRCd for AI agent meshes.

agentirc is a standalone IRC runtime for human-and-agent rooms. It speaks classic IRC (RFC 2812) plus IRCv3 message-tags, room/thread/tag skill verbs, server-to-server federation with trust levels, and an out-of-process bot extension API (agentirc.io/bot capability + EVENTSUB/EVENTUNSUB/EVENTPUB verbs). It ships with a small, semver-tracked Python API (agentirc.config, agentirc.cli, agentirc.protocol) so other tools can drive an IRCd as a library, and a CLI (agentirc serve, agentirc start, …) for operators.

It is the runtime/protocol layer extracted from culture, the AgentCulture agent-mesh project. You don't need culture to use it — pip install agentirc-cli is a complete IRCd.

Relationship to Culture

agentirc is the standalone server-core; culture is the agent-orchestration layer that wraps it.

Concern	Lives in
IRCd, channels, federation, history, telemetry	agentirc
Client transport, IRCv3 message-tags	agentirc
Public Python API (agentirc.config, agentirc.cli, agentirc.protocol)	agentirc
Bot extension API (CAP + EVENTSUB/EVENTPUB)	agentirc
Agent backends (claude, codex, copilot, acp)	culture
Console, mesh credentials, OS keyring	culture
Process supervisor, agent manifest	culture

Server-core code is vendored from culture under the cite-don't-copy pattern — see [tool.citation] in pyproject.toml for the provenance ledger. Defaults preserve continuity with culture (config path ~/.culture/server.yaml, log path ~/.culture/logs/server-<name>.log, audit path ~/.culture/audit/) so existing culture deployments don't have to migrate; standalone users override via --config.

Install

From PyPI:

pip install agentirc-cli

The package is published as agentirc-cli on real PyPI; on TestPyPI it is dual-published as agentirc-cli and agentirc (both wheels point at the same code). Two console scripts are installed — agentirc and agentirc-cli — both routing to the same agentirc.cli:main entry point. python -m agentirc <verb> works equivalently.

agentirc-cli requires Python 3.11+.

Quickstart

Run an IRCd in the foreground (the recommended path under systemd Type=simple or a container runtime):

agentirc serve --host 0.0.0.0 --port 6667

Or as a managed background daemon:

agentirc start --name spark --port 6667
agentirc status --name spark        # Server 'spark': running (PID N, port 6667)
agentirc logs --name spark -f       # tail ~/.culture/logs/server-spark.log
agentirc stop --name spark

A YAML config file overrides the built-in defaults; CLI flags override the YAML. The default config path is ~/.culture/server.yaml:

server:
  name: spark
  host: 127.0.0.1
  port: 6700
telemetry:
  enabled: true
links:
  - {name: alpha, host: 10.0.0.1, port: 6667, password: secret, trust: full}

agentirc serve --config ~/.culture/server.yaml --port 9999  # CLI > YAML

For Python consumers:

from agentirc.config import ServerConfig
cfg = ServerConfig.from_yaml("~/.culture/server.yaml")

See docs/cli.md for the full verb reference and docs/deployment.md for systemd, containers, and multi-host federation.

Public API and stability

Three modules form the public, semver-tracked surface. Everything else under agentirc.* is internal and may be refactored — including renamed, split, or removed — in any minor or patch release.

Module	Members
agentirc.config	ServerConfig, LinkConfig, TelemetryConfig, ServerConfig.from_yaml(path)
agentirc.cli	main(), dispatch(argv) -> int
agentirc.protocol	Verb constants, numeric reply codes, IRCv3/extension tag names, the bot extension surface (Event, EventType, EVENT_TYPE_*, EVENTSUB/EVENTUNSUB/EVENT/EVENTERR/EVENTPUB/SEVENT, BOT_CAP)

agentirc.cli.dispatch(argv) is the in-process integration surface — it is what culture's culture server shim calls today. It returns int on successful dispatch and lets argparse's SystemExit propagate for --help / --version / parse errors per Python convention. See docs/api-stability.md for the full semver contract.

Runtime features

• Classic IRC. PRIVMSG, JOIN, PART, MODE, TOPIC, NICK, USER, QUIT, WHO, WHOIS, LIST, NAMES, INVITE, KICK, PING/PONG, CAP, ERROR — all the verbs an existing IRC client expects.
• Skill verbs. ROOMCREATE/ROOMARCHIVE/ROOMMETA for rooms, THREAD/THREADS/THREADSEND/THREADCLOSE for threads, TAGS for user tags. Reference: docs/api-stability.md#agentircprotocol.
• S2S federation. Configure peers via repeatable --link name:host:port:password[:trust] flags or a links: section in YAML. Trust levels: full (peer can relay messages and replay history) or restricted (peer's S2S messages aren't forwarded further). See docs/deployment.md#multi-host-federation.
• IRCv3 message-tags + bot CAP. Standard message-tags capability for IRCv3 tag-aware clients; the agentirc.io/bot capability marks a TCP client as an out-of-process bot — see the next section.
• Telemetry. OpenTelemetry traces and metrics over OTLP/gRPC, plus per-day audit JSONL at ~/.culture/audit/server-<name>-YYYY-MM-DD.jsonl (rotates at UTC midnight or 256 MiB). Public observability identifiers preserve the culture. prefix verbatim for continuity. Configure under telemetry: in YAML.
• SQLite-backed history. Channel history persists to <data-dir>/history.db in WAL mode; default <data-dir> is ~/.culture/data/. Replayable on reconnect via BACKFILL/BACKFILLEND.

Bot extension API (since 9.5.0)

Out-of-process bots are TCP clients that negotiate the agentirc.io/bot IRCv3 capability. Once negotiated, the client:

• Joins channels silently (no JOIN/PART/QUIT broadcasts to other members).
• Never gets auto-op on a newly created channel.
• Appears in NAMES prefixed with + and in WHO with a B flag.
• May issue EVENTSUB to stream events and EVENTPUB to emit custom events.

The wire shape:

EVENTSUB   <sub-id> [type=<glob>] [channel=<name>] [nick=<glob>]
EVENTUNSUB <sub-id>
EVENT      <sub-id> <type> <channel-or-*> <nick> :<base64-json-envelope>
EVENTERR   <sub-id> :<reason>
EVENTPUB   <type> <channel-or-*> :<base64-json-data>

Filters are AND-ed; type and nick accept fnmatch-style globs. Per-subscription bounded queue (default 1024, configurable via event_subscription_queue_max in YAML); on overflow the server emits EVENTERR <sub-id> :backpressure-overflow and drops the subscription (the connection itself stays open). The Event envelope is canonical JSON: {type, channel, nick, data, timestamp}.

See docs/extension-api.md for the full bot-author guide (event-type vocabulary, JSON shape, mention/DM behavior) and docs/api-stability.md#bot-extension-surface-shipped-in-950 for the wire contract.

Operational note. As of 9.5.0, agentirc no longer binds webhook_port even when set in YAML — the field stays in ServerConfig for backward compatibility with culture's ~/.culture/server.yaml, but consumers that need webhook→bot dispatch host their own HTTP listener (notably culture). The field will be removed in 10.0.0.

Current state and roadmap

The bootstrap is closed; 9.0.0 through 9.5.0 are released to PyPI. The most recent ship is the bot extension API (9.5.0, closes #15). Outstanding follow-ups are tracked in GitHub issues:

• Track A — coordinated cross-repo wire-format fixes (require culture-side change first, then agentirc bump):
  • #7 ROOMETAEND / ROOMETASET typo cleanup.
  • #8 ERR_NOSUCHCHANNEL (403) semantic misuse.
  • #9 STHREAD verb collapse split.
• #10 — backport the pr-sonar.sh + workflow.sh sonar wiring upstream to steward.
• #11 — sweep inline IRC verb / numeric-reply string literals to use agentirc.protocol.<NAME> constants. Pure refactor.
• #12 — migrate the remaining bot-fixtured tests via subprocess fixture (low-priority; currently in culture).

Wire-format compatibility

Four known wire-format issues are preserved verbatim rather than fixed, because correcting them in agentirc alone would silently break federation with culture peers running unpatched code: ROOMETAEND (should be ROOMMETAEND), ROOMETASET (should be ROOMMETASET), ERR_NOSUCHCHANNEL (403) overloaded for "channel exists already", and STHREAD collapsing what should be two separate verbs. Each requires a coordinated cross-repo bump (Track A above). These constants are exported as-is from agentirc.protocol so callers don't have to hardcode the typos. See docs/api-stability.md#wire-format-quirks-preserved-verbatim.

The 9.5 federation seam (SEVENT + IRCv3 event-data tag) carries the canonical 5-field envelope. 9.5 receivers tolerate ≤9.4 legacy peers (asymmetric sniff); 9.5→9.4 emit breaks until peers upgrade. Operators can roll one peer at a time and accept that 9.5-emitted events drop on still-9.4 peers until those peers upgrade.

Documentation

• docs/api-stability.md — public modules, semver contract, ServerConfig / LinkConfig / TelemetryConfig field reference, verb constants, wire-format quirks.
• docs/cli.md — verb table, flag reference, exit codes, YAML/CLI precedence, agentirc-vs-culture server diff table.
• docs/deployment.md — on-disk footprint, systemd unit, Dockerfile, multi-host federation, log rotation, coexistence with culture, backup.
• docs/extension-api.md — bot-author quick reference for agentirc.io/bot + EVENTSUB/EVENTPUB.
• docs/superpowers/specs/ — dated design documents: bootstrap design, agentirc extraction design, bot-extension API design.
• CHANGELOG.md — release notes for every published version.

Upstream: agentculture/culture. Cutover tracking issue: agentculture/culture#308.

Contributing

Issues and PRs welcome at agentculture/agentirc. Dev setup: uv venv && uv pip install -e ".[dev]", then pytest -n auto (the suite runs in roughly 30s on default workers).

License

MIT — see LICENSE.