Asymptote-Labs/agent-beacon

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Beacon captures agent session history across Claude Code, Cursor, Codex, OpenCode, and 20+ other harnesses, then turns useful workflows, corrections, and debugging patterns into reusable knowledge for future agents.

A problem solved by one agent shouldn't need to be learned from scratch by another.

Beacon is an open-source memory layer for AI coding agents that learns from your work across Claude Code, Cursor, Codex, OpenCode, and 20+ other harnesses. It captures full session history, identifies useful workflows, corrections, and debugging patterns, and makes that knowledge reusable by future agents. Built for developers who want agent knowledge to compound across tools instead of disappearing when a session ends.

Key Capabilities:

• Cross-harness history - sessions from Claude Code, Cursor, Codex, OpenCode, Cline, and 20+ harnesses in one place
• Knowledge that compounds - workflows, corrections, debugging patterns, and repo conventions that survive beyond a single session
• Shared agent memory - reviewed knowledge future agents can retrieve through MCP or Agent Skills
• Exact session replay - prompts, responses, tools, commands, edits, approvals, MCP activity, and tokens in one trace
• Local-first portability - durable JSONL, explicit destinations, and no harness lock-in

Beacon is open source and local-first. Interactive endpoint setup signs in through beacon.sh and preselects Beacon Cloud, with an explicit Local opt-out. Signing in forwards nothing; confirming Managed installs Beacon and connects this machine in the same command, and the confirm screen says so before you accept. System, package, MDM, and CI installation paths remain noninteractive and account-free.

brew trust asymptote-labs/tap
brew tap asymptote-labs/tap
brew install beacon

beacon endpoint install

curl -fsSL https://github.com/asymptote-labs/agent-beacon/releases/latest/download/install.sh | bash

curl -fsSLO https://github.com/asymptote-labs/agent-beacon/releases/latest/download/install.sh
less install.sh
bash install.sh

VERSION="$(curl -fsSLI -o /dev/null -w '%{url_effective}' https://github.com/asymptote-labs/agent-beacon/releases/latest)"; VERSION="${VERSION##*/v}"
case "$(uname -m)" in x86_64) ARCH=amd64 ;; aarch64) ARCH=arm64 ;; esac
FORMAT=deb   # or rpm for Fedora, RHEL, Rocky, Alma
PKG="beacon_${VERSION}_linux_${ARCH}.${FORMAT}"
BASE="https://github.com/asymptote-labs/agent-beacon/releases/download/v${VERSION}"

# Download into a directory APT can read. A package in your home directory still
# installs, but APT ends with a harmless "Permission denied" notice.
DIR="$(mktemp -d /tmp/beacon-install.XXXXXXXX)" && chmod 0711 "$DIR" && cd "$DIR"
curl -fsSLO "${BASE}/${PKG}" && curl -fsSLO "${BASE}/checksums.txt" && chmod 0644 "${PKG}"
grep "  ${PKG}$" checksums.txt | sha256sum --check - && \
sudo apt install "./${PKG}"   # or: sudo dnf install "./${PKG}"

msiexec /i BeaconEndpointAgent-<version>-x64.msi

msiexec /i BeaconEndpointAgent-<version>-x64.msi /qn

Open Claude Code, Cursor, Codex, or any other supported harness.

Beacon continuously captures your session history in the background

beacon traces

This opens a local terminal browser for traces, event timelines, token usage, and retained content. Nothing is sent anywhere. To use the local web view instead:

beacon endpoint dashboard

Or inspect the raw event stream:

~/.beacon/endpoint/logs/runtime.jsonl

Whichever destination you choose, the wizard also installs the Beacon Skills into ~/.agents/skills and ~/.claude/skills unless you turn them off; redo or undo that with beacon skills install|uninstall.

If you choose Beacon Cloud, the wizard also registers Beacon Cloud MCP in your harnesses unless you turn it off, so your agents can search the forwarded history. To do it later, or for an endpoint connected another way:

beacon mcp connect

This registers the beacon-managed MCP server in Claude Code, Codex CLI, Cursor, VS Code, Gemini CLI, and OpenCode, and each harness signs in with OAuth the first time it connects. No token is written. beacon mcp disconnect removes exactly what it added. The local beacon MCP server (beacon mcp serve) is separate and never touches the network. See beacon mcp connect.

Inspect the account used during interactive setup:

beacon whoami

Every agent session contains potentially useful knowledge about your codebase.

Beacon creates a loop around that history:

Run agents
    ↓
Capture session history
    ↓
Evaluate what worked
    ↓
Extract useful knowledge
    ↓
Review + approve
    ↓
Reuse across future agents

That could be:

• the right way to run a migration
• a debugging path that finally fixed an obscure issue
• a testing convention agents repeatedly get wrong
• a repository-specific workflow
• the right sequence of internal tools
• a correction you've given multiple agents

Instead of disappearing into old sessions, that knowledge becomes reusable.

Most agent memory belongs to a single harness.

Beacon sits across the harness layer.

Claude Code ─┐
Cursor ──────┤
Codex ───────┼──→ Beacon ──→ shared project knowledge
OpenCode ────┤
Cline ───────┘

Because Beacon captures and normalizes session history across tools, knowledge learned through Claude Code doesn't have to stay in Claude Code.

Your Cursor sessions can improve Codex.
Your Codex sessions can improve OpenCode.
Your history keeps compounding even as you switch tools.

Your agent session history belongs to you, not the harness.

Beacon captures agent execution where it happens and normalizes it into a common OpenTelemetry-based event model.

That includes:

• sessions
• prompts and responses
• tool calls
• commands
• file activity
• approvals
• MCP interactions
• token usage

Instead of separate proprietary histories for every coding tool, you get one dataset you can inspect, search, learn from, and build on.

Beacon ships with a local, read-only dashboard:

beacon endpoint dashboard

Use it to explore session history across harnesses and understand what your agents actually did.

Each session page can also show lenses: purpose-built views of one trace, such as files changed with their diffs, an itemized token bill, a security review grouped by risk, or the approval timeline. A lens is a single HTML file running in a sandboxed frame with no access to Beacon or the dashboard and no ordinary network APIs, so you can have your coding agent write your own (beacon lenses spec, lint, preview, add). The sandbox cannot block every way a browser can send data out, so install only lenses you trust with your traces. See Lenses.

The underlying JSONL remains directly accessible, so you're never dependent on the UI.

Beacon supports local agents, browser agents, cloud agents, CI workflows, and agent SDKs.

Skills shows how to install Beacon Skills, the Agent Skills that recall and distill project memory from these traces. Every runtime above loads Agent Skills:

• Plugin: install the beacon plugin from this repository's marketplace, for example /plugin marketplace add asymptote-labs/agent-beacon in Claude Code.
• Package (Pi, Prime Agent): pi install git:github.com/asymptote-labs/agent-beacon.
• Power (Kiro): import https://github.com/asymptote-labs/agent-beacon/tree/main/agent-skills from the Powers panel.
• skills CLI: npx skills add asymptote-labs/agent-beacon, optionally with -a <agent>.
• A directory: copy agent-skills/skills/* into that project directory.

The Beacon Skills page has the exact command for each runtime.

Beacon writes endpoint telemetry to local JSONL by default.

You can also forward the same normalized session history into infrastructure you already use:

Splunk · Datadog · Elastic · Microsoft Sentinel · CrowdStrike Falcon LogScale · Sumo Logic · Wazuh · AWS S3 · GCS · CloudWatch

Beacon captures activity where agents actually run and normalizes it into one shared event model.

Local agents ───────┐
Browser chat ───────┤
CI ─────────────────┼──→ Beacon ──→ unified session history
Cloud agents ───────┤                    │
Agent SDKs ─────────┘                    ├──→ local JSONL
                                         ├──→ reviewed memory
                                         ├──→ MCP / Agent Skills
                                         └──→ your own infrastructure

See the documentation for the full architecture breakdown.

Read the docs for:

• installation
• supported runtimes
• event schema
• session history
• memory
• MCP
• Agent Skills
• forwarding
• advanced configuration

Read the docs →

Contributions are welcome.

Open an issue, submit a pull request, or join the Discord.

MIT