A local-first memory add-on for coding agents. It records what happened, when it happened, and why, and shows it in a shared ChronoLoom view.

Keeping a shared record of agent activity, including its timing and reasons. Reviewing that history through the ChronoLoom view.

It helps keep useful session context available without relying on a remote service. This can make past decisions and events easier to review.

underpass — Plugin by underpass-ai

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Claude Code

/plugin marketplace add underpass-ai/kmp

agentmods

npx agentmods add plugins/underpass-ai/kmp/marketplace

Clone the repo

git clone --depth 1 https://github.com/underpass-ai/kmp

Made for: Claude Code.

Per session not measured What this adds to a session before it is invoked.

When invoked not measured Not applicable: nothing here is loaded into a session.

Security scan A 0 findings. Scan, not verified.

Origin original No closer match found in the catalogue.

Security

Grade A, and why

underpass scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.claude-plugin/marketplace.json · 21 lines

What it actually says

{
  "name": "underpass",
  "description": "KMP by Underpass",
  "owner": {
    "name": "Underpass AI",
    "url": "https://underpassai.com"
  },
  "plugins": [
    {
      "name": "kmp",
      "description": "Local-first agent memory that preserves what happened, when and why, with a shared ChronoLoom view.",
      "source": {
        "source": "git-subdir",
        "url": "https://github.com/underpass-ai/kmp.git",
        "path": "plugins/kmp",
        "ref": "v0.6.2"
      }
    }
  ]
}

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

yesterday First seen · 21 lines scan A d20c9b2c3609

Subscribe to this mod's changes

underpass is a plugin published in the GitHub repository underpass-ai/kmp (0 stars, last pushed yesterday), licensed Apache-2.0. Its token cost is not measured: this kind of file is read by the harness, not the model. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Memory and context

underpass

Getting it into your agent

Grade A, and why

Nothing flagged

What it actually says

What this file has done since we first saw it

Other plugins, from other repositories

humanizer

nextjs

nextjs

claude-plugins-official

knowledge-work-plugins

ecc