Behaviour Specification From Observation

Community

Sahil-SS9

behaviour-specification-from-observation

Turn observed behaviour into a compatibility contract.

Overview

Publisher	Sahil-SS9
Repository	`agent-personas`
Skill name	`behaviour-specification-from-observation`
Stars	67
Forks	4
Bundled files	1
License	MIT
Links	Skill source Repository

Markdown instructions
A SKILL.md file the model loads on demand, so it only costs tokens when a request actually matches.
Works with any LLM
AI skills are plain Markdown, not provider-specific code, so this works with GPT, Claude, Gemini, Grok, or a local model.
1 bundled files
Scripts, templates, and references the model can read while it works. Files are read-only and never executed.
Open source
Published by Sahil-SS9 on GitHub. Read the source before you install it.

Installation

Install the Behaviour Specification From Observation AI skill in TypingMind to use it with any LLM, or drop it into another agent that reads SKILL.md.

Install in TypingMind

TypingMind installs a skill straight from its GitHub folder — it reads SKILL.md, bundles the resource files, and stores the result locally.

Open the app and go to Plugins → Skills.
Choose "Install from GitHub".
Paste the skill folder URL below and confirm.
https://github.com/Sahil-SS9/agent-personas/tree/main/skills/behaviour-specification-from-observation
Enable the skill in any chat where you want it available.

Store

Installed

Skills

Add skills

Import one or more skills from a public GitHub folder or a local .skill or .zip archive, or SKILL.md file.

From GitHub URLFrom .skill, .zip, or SKILL.md

GitHub repo or folder

https://github.com/Sahil-SS9/agent-personas/tree/main/skills/behaviour-specification-from-observation

Points to a single skill folder, or any folder that contains multiple skills. Public repos only.

CancelContinue

Plugins → Skills → Add skill → From GitHub URL, then paste the folder URL and press Continue.

Install in another agent

Any agent that reads the Agent Skills format can use this skill — copy the folder into that agent's skills directory.

Claude Code — .claude/skills

git clone --depth 1 https://github.com/Sahil-SS9/agent-personas.git /tmp/agent-personas
mkdir -p .claude/skills
cp -r /tmp/agent-personas/skills/behaviour-specification-from-observation .claude/skills/behaviour-specification-from-observation

Restart Claude Code after copying so it picks up the new skill.

Use it in TypingMind

Enable Behaviour Specification From Observation in any TypingMind chat and the model takes it from there. Its name and description sit in the system prompt, and the moment a request matches, the model loads the full instructions itself — you never invoke it by hand, and it costs no tokens until it is actually used.

The model loads Behaviour Specification From Observation on its own as soon as a request matches it.

Works with any AI model

AI skills are plain Markdown instructions rather than provider-specific code, so Behaviour Specification From Observation is not tied to the model it was written for. Install it once in TypingMind and use it with GPT-5, Claude, Gemini, Grok, DeepSeek, Mistral, Llama, or a local model you run yourself — all on your own API keys.

Loaded only when it is needed
The system prompt carries just the name and description. The instructions are fetched on the first matching request, so an idle skill costs nothing.
Switch models mid-chat
Because the skill is instructions rather than code, changing model does not break it — the next model reads the same SKILL.md.

Skill instructions

This is the SKILL.md content the model loads. Read it before installing — a skill is instructions your model will follow.

Behaviour specification from observation

Turn externally observable behaviour into an implementation-ready contract. Do not infer hidden source structure when the evidence only supports outputs.

Inputs and boundary

Record authority, target/version/platform, test environment, fixture provenance, hashes and the question being answered. Use only synthetic or owner-authorised inputs. Separate observation from interpretation; label every statement observed, derived or unknown.

Procedure

Inventory the public surface: inputs, outputs, state, timing, environment, persistence and side effects.
Build a matrix of normal, boundary, malformed and safe negative-control cases.
Capture exact output shape, ordering, encoding, numeric tolerance, error class/message policy, retries and idempotency.
Model state transitions, concurrency assumptions and reset conditions explicitly.
Repeat compatibility-critical observations with an independent fixture or run; document nondeterminism and platform variance.
Convert observations into invariants plus executable examples. Do not copy source, proprietary assets or expressive text into the implementation packet.
Review unknowns and unresolved legal/licensing boundaries before handoff.

Contract format

Each requirement has: ID; input fixture/hash; precondition; action; expected output/error; tolerance; state transition; oracle; provenance; confidence; known exclusions. Include a versioned change log.

Verification

A specification is implementation-ready only when every requirement has an oracle and example, every negative control differs for a stated reason, unknowns are visible, and a second observation supports each compatibility-critical claim. A passing example is not proof of untested behaviour.

Bundled files

The model reads these on demand while the skill is loaded. They are exposed as readable files and are never executed.

NOTICE1 KB

Frequently asked questions

What does the Behaviour Specification From Observation AI skill do?

Turn observed behaviour into a compatibility contract.

Why use Behaviour Specification From Observation on TypingMind?

Because you install it once and use it with any model. Behaviour Specification From Observation is plain Markdown rather than provider-specific code, so the same skill runs on GPT-5, Claude, Gemini, Grok, or a local model — and you can switch model mid-chat without it breaking. TypingMind runs on your own API keys, so you pay providers directly instead of a per-seat subscription, and your skills and chats stay in your own storage.

How do I install Behaviour Specification From Observation in TypingMind?

Open Plugins → Skills → Install from GitHub in TypingMind and paste https://github.com/Sahil-SS9/agent-personas/tree/main/skills/behaviour-specification-from-observation. TypingMind reads its SKILL.md and bundles its files and installs it as a skill you can enable per chat.

Which AI models can use Behaviour Specification From Observation?

Any model you connect in TypingMind. AI skills are plain Markdown instructions rather than provider-specific code, so GPT, Claude, Gemini, Grok, and local models can all load this skill when a request matches it.

How many AI models can I use with Behaviour Specification From Observation?

As many as you like. As long as a model supports skills, you can use Behaviour Specification From Observation with it — GPT, Claude, Gemini, Grok, DeepSeek, Mistral, Llama and more — all on TypingMind with your own API keys.

Is the Behaviour Specification From Observation AI skill free?

Yes. It is published on GitHub by Sahil-SS9 under the MIT license. You only pay your own AI provider for the tokens you use.

What are AI skills?

An AI skill is a reusable instruction bundle that teaches an AI model how to do one specific task. It follows the open Agent Skills format: a SKILL.md file with a name and description, plus any scripts, templates or reference files the model may need. The model reads the instructions only when your request matches the skill, so an installed skill costs nothing until it is used.

How are AI skills different from plugins or MCP servers?

A plugin or MCP server gives a model new tools to call — code that runs somewhere and returns a result. An AI skill gives the model knowledge and process instead: how to approach a task, which steps to follow, what good output looks like. Skills are plain Markdown, so they need no server, no API key and no runtime, and they work with any model.

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Overview

Installation

Install in TypingMind

Install in another agent

Use it in TypingMind

Works with any AI model

Skill instructions

Behaviour specification from observation

Inputs and boundary

Procedure

Contract format

Verification

Bundled files

Frequently asked questions

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