What is gantt AGENTS.md?

Repository instructions for developers and coding agents working on DHTMLX Gantt, an open-source JavaScript chart library for planning work over time.

Use them to find source, extension, style, sample, build, and test files, and to follow the documented build and verification process.

They explain the code layout, generated files, development commands, and repository rules so changes fit the project.

gantt AGENTS.md — Instructions file by DHTMLX

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.

agentmods

npx agentmods add instructions/dhtmlx/gantt/agents-md

Clone the repo

git clone --depth 1 https://github.com/DHTMLX/gantt

Made for: Codex, OpenCode.

Per session 636 This file is loaded in full into every session.

When invoked 636 The same file — it is already loaded in full.

Security scan A 0 findings. Scan, not verified.

Origin original No closer match found in the catalogue.

Token cost

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	$0.00636	$0.00636
Opus 5	$0.00318	$0.00318
Sonnet 5	$0.00127	$0.00127
Haiku 4.5	$0.00064	$0.00064

Measured yesterday against content hash b816f7b7143a, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

gantt AGENTS.md 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.

AGENTS.md · 47 lines

How it starts

The opening of the file, as written. The whole thing — 47 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

Guidance for AI coding agents working in this repository.

What this is

DHTMLX Gantt, MIT edition — an open source JavaScript Gantt chart library. The repository ships library sources, samples, and a smoke test suite. It is generated from an internal source tree on each release (see CONTRIBUTING.md), so structural refactors should stay minimal and focused.

Layout

Path	Content
`src/dhtmlxgantt.ts`	library entry point
`src/core/`	core: datastores, task data layer, UI (grid, timeline, lightbox), worktime
`src/core/plugins/`	always-on plugins (batch update, task types, formatters…)
`src/ext/`	opt-in extensions activated via `gantt.plugins({...})` (tooltip, quick_info, keyboard_navigation…)
`src/css/`	LESS styles, fonts, skins
`src/locale/`	locales
`samples/`	runnable demos; served by `npm run start`, and the corpus the smoke test loads
`scripts/`	build/dev/test node scripts, sample-data backend
`codebase/`	build output (generated; never edit by hand)

Commands

npm install
npm run build          # vite build -> codebase/ + d.ts
npm run start          # watch build + backend (:9200) + vite devserver
npm run test           # build + smoke test: every sample loads without console errors
npm run test 07_grid   # smoke just one samples folder
npm run lint           # eslint over src/ (flat config, intentionally lax)

Working on the code

The build must stay green: npm run build after any src/ change, and npm run lint should pass.
npm run test is a smoke pass: it loads every sample headless and fails on a page error or console.error. It is the regression net — keep it green after src/ changes.
Sample pages reference ../../codebase/dhtmlxgantt.js — run a build before opening them.
src/types.d.ts declares the compile-time globals (VERSION, LICENSE, …) injected by vite define.
Some modules are intentional basic implementations of Pro features (e.g. src/core/ui/render/dummy_layer.js, re-export shims like src/core/ui/grid/resource_grid.js, and src/core/worktime/strategy/calendar_strategy.js which re-exports the disabled no_work_time strategy — working-time calendars are out of scope). Do not "complete" them — the Pro feature set is out of scope for this edition (see README).

Read the full file on GitHub · 47 lines

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 · 47 lines · 636 tokens per session scan A b816f7b7143a

Subscribe to this mod's changes

gantt AGENTS.md is an instructions file published in the GitHub repository DHTMLX/gantt (1,841 stars, last pushed 12d ago), licensed MIT. It adds 636 tokens to every session, about $0.0032 per session on Opus 5. 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.

Planning Project Management Project management Testing dhtmlx gantt gantt-chart ganttjs javascript-gantt

gantt AGENTS.md

Getting it into your agent

What it costs to keep this loaded

Grade A, and why

Nothing flagged

How it starts

AGENTS.md

What this is

Layout

Commands

Working on the code

What this file has done since we first saw it

Other instructions, from other repositories

single-file-wbs CLAUDE.md

task-cli GEMINI.md

FlowBoard AGENTS.md

STAR AGENTS.md

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claude-sdd-planner AGENTS.md