TrueForge is an agent runtime that runs the execution loop connecting language models, tools, skills, sandboxes, approvals, context handling, and session state. Developers use it through a chat interface, HTTP API, TypeScript SDK, or embeddable UI to build and operate AI agents.
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.
git clone --depth 1 https://github.com/truefoundry/trueforgeWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/rules/truefoundry/trueforge/server-types-runtime-only)<a href="https://agentmods.dev/rules/truefoundry/trueforge/server-types-runtime-only"><img src="https://agentmods.dev/badge/rules/truefoundry/trueforge/server-types-runtime-only/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/rules/truefoundry/trueforge/server-types-runtime-only"><img src="https://agentmods.dev/badge/rules/truefoundry/trueforge/server-types-runtime-only.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00000 | $0.00402 |
| Opus 5.5 | $0.00000 | $0.00161 |
| Sonnet 5.5 | $0.00000 | $0.00080 |
| Haiku 4.5 | $0.00000 | $0.00040 |
Grade A, and why
server-types-runtime-only 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 23d ago.
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.
What it actually says
Server types — runtime is the sole owner
Canonical AgentUIServer / chat / builder / catalog port types live only in
packages/assistant-ui-runtime
(src/server/types.ts + events.ts).
Rules
packages/trueforge-ui/src/server/types.tsis the host-facing barrel: re-export only from@truefoundry/trueforge-assistant-ui-runtime(prefer/serverwhen avoiding root name collisions). Do not put hand-written server port/DTO interfaces there or elsewhere in this monorepo.- Hosts import types from
@truefoundry/trueforge-uionly — they must not need the runtime package for types. - Need a new field/method on the contract? Change runtime
server/types.tsfirst, then re-export and changeset both affected packages — never fork the shape in the UI SDK. - React wiring may stay here (
ServerContext,ShellModeContext,TrueForgeServerConfig). Those modules import runtime types; they do not redefine ports. - Host adapters (e.g. frontend
harnessServer) widen via generics / intersections over runtime bases (SkillMount/McpServerMountstay opaqueobject).
Examples
// ✅
import type { AgentUIServer, ListResult } from './types.js';
// ❌ local duplicate
export interface AgentChatServer { /* ... */ }
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.
- 23d ago Changed · +1 lines ba7d0e3e3c66
- 1mo ago First seen · 37 lines · 0 tokens per session scan A fafa598affb3
server-types-runtime-only is a cursor rule published in the GitHub repository truefoundry/trueforge (6,237 stars, last pushed yesterday), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 402 tokens. 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 2026-08-30.
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