declarative-agent-developer

declarative-agent-developer is a skill for Claude Code from microsoft/work-iq. It costs 152 tokens per session (431 once invoked), scanned A, original, no licence file.

A development guide for Microsoft 365 Copilot and Teams declarative agents. These are agents defined largely through configuration files, including manifests and language files.

In plain words
What is it for?
Use it to scaffold agents, edit manifests, add capabilities, translate them into other languages, build them, and deploy them.
Why use it?
It brings creation, editing, localization, building, and deployment into one workflow. It also explains the special file structure needed for localized agents.

Skill for Claude Code ✓ vendor

Written for Claude Code: shipped in a Claude Code plugin.

Part of the microsoft-365-agents-toolkit plugin — 7 skills shipped together

Good fit Use it to scaffold agents, edit manifests, add capabilities, translate them into other languages, build them, and deploy them.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/microsoft/work-iq/declarative-agent-developer
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.

Any agent
npx skills add microsoft/work-iq --skill declarative-agent-developer
Clone the repo
git clone --depth 1 https://github.com/microsoft/work-iq

Made for: Claude Code.

Or install microsoft-365-agents-toolkit, the plugin that ships this one along with the rest of its 7 skills.

Wrote 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.

agentmods badge for declarative-agent-developer

README.md
[![agentmods](https://agentmods.dev/badge/skills/microsoft/work-iq/declarative-agent-developer/github.svg)](https://agentmods.dev/skills/microsoft/work-iq/declarative-agent-developer)
Your own site
<a href="https://agentmods.dev/skills/microsoft/work-iq/declarative-agent-developer"><img src="https://agentmods.dev/badge/skills/microsoft/work-iq/declarative-agent-developer/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.

agentmods 80×15 button for declarative-agent-developer

Your own site · 80×15
<a href="https://agentmods.dev/skills/microsoft/work-iq/declarative-agent-developer"><img src="https://agentmods.dev/badge/skills/microsoft/work-iq/declarative-agent-developer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 152 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 431 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00152 $0.00431
Opus 5.5 $0.00061 $0.00172
Sonnet 5.5 $0.00030 $0.00086
Haiku 4.5 $0.00015 $0.00043

Measured 2d ago against content hash 5082367e5cb4, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

declarative-agent-developer 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 2d 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.

plugins/microsoft-365-agents-toolkit/skills/declarative-agent-developer/SKILL.md · 42 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

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.

  1. 2d ago Changed · -158 lines · -56 tokens per session scan B → A 5082367e5cb4
  2. 1mo ago Changed · +6 lines · +21 tokens per session a41385e1217d
  3. 1mo ago First seen · 194 lines · 187 tokens per session scan B 13d2af8dd44c

Subscribe to this mod's changes

declarative-agent-developer is a skill published in the GitHub repository microsoft/work-iq (1,034 stars, last pushed 2d ago), with no licence file. It adds 152 tokens to every session and 431 once invoked, about $0.0006 per session on Opus 5.5. 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.

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