| name | ubiquitous-language |
| description | Maintains feature documentation in .agents/features/ and performs mandatory feature overlap detection before any new feature is proposed. Also builds a shared domain vocabulary for Activepieces. Use when the user asks to define domain terms, build a glossary, harden terminology, create ubiquitous language, references "domain model" or "DDD", or asks about adding a new feature. |
Activepieces Ubiquitous Language
Maintain per-feature documentation in .agents/features/, establish a shared vocabulary for the Activepieces domain, and prevent redundant features by detecting overlap with existing functionality before any new work begins.
Trigger Phrases
Activate this skill when the user:
- Asks to define domain terms, build a glossary, or harden terminology
- Mentions "ubiquitous language", "domain model", or "DDD"
- Says they want to "create ubiquitous language" or "align on terminology"
- Asks about adding, building, or proposing any new feature
- Uses a term ambiguously or inconsistently across the conversation
Workflow
Step 1: FEATURE OVERLAP DETECTION (mandatory before any new feature)
Before writing a single line of code or proposing a design for a new feature, you MUST check for existing features with similar or overlapping functionality.
Search checklist — complete all five before concluding:
-
Feature docs — read all .md files in .agents/features/ to understand what features already exist, what they cover, and how they work. This is the primary source of truth for feature inventory.
-
Components / services / hooks — use the Glob tool to find files whose names relate to the proposed concept (e.g., packages/**/*<keyword>*.{ts,tsx}), then use the Grep tool to search file contents for the keyword. Also search by directory name patterns (e.g., packages/server/api/src/app/<concept>/).
-
Route definitions — use the Grep tool to check whether an API route already covers the use case: search for the keyword in packages/server/api/src with glob *.ts.
-
Shared types — use the Grep tool to inspect packages/shared/src/ for existing type definitions or enums that represent the concept.
-
Feature flags / plan limits — use the Grep tool to search packages/shared/src/lib/ for any existing capability or plan flag that may gate the feature.
Decision rule:
| Finding | Action |
|---|
| Close match exists | Present the match to the user. Recommend extending the existing feature. Do NOT proceed with a new feature without explicit user approval. |
| Partial overlap | Present overlapping parts. Ask whether the new feature should be merged into the existing one or kept separate, and document the rationale. |
| No match | Confirm to the user that no overlap was found, then proceed with the new feature design. |
Always present your findings to the user before proceeding. Never silently skip this step.
Step 2: FEATURE DOCUMENTATION
Every feature in Activepieces must have a corresponding .md file in .agents/features/. This is a living registry that agents and developers use to understand what exists before building something new.
2a. When creating a new feature
After the feature is implemented, create a new file at .agents/features/<feature-name>.md with this structure:
# <Feature Name>
## Summary
One-paragraph description of what this feature does and why it exists.
## Key Files
- `packages/web/src/features/<path>` — frontend components
- `packages/server/api/src/app/<path>` — backend service/controller
- `packages/shared/src/lib/<path>` — shared types
## Edition Availability
Which editions support this feature (Community, Enterprise, Cloud).
## Domain Terms
Key terms used by this feature (link to glossary definitions if they exist).
2b. When modifying an existing feature
After making changes to a feature, update its .agents/features/<feature-name>.md to reflect:
- New or removed key files
- Changed edition availability
- New domain terms introduced
- Any scope changes to the feature's summary
This is not optional. Every PR that changes a feature's behavior must include an update to its feature doc.
Step 3: DOMAIN GLOSSARY MANAGEMENT
3a. Scan the conversation for domain terms
As you read the conversation, collect every noun, verb, or phrase that:
- Names a core entity (e.g. Flow, Piece, Step, Run, Connection, Project, Platform)
- Names a process or action (e.g. publish, trigger, execute, sync)
- Carries specialised meaning in this codebase that differs from everyday usage
- Is used inconsistently or interchangeably with another term
3b. Flag problems before writing the glossary
Before updating the glossary, surface any of the following to the user for resolution:
| Problem type | Example | How to flag |
|---|
| Ambiguity — same word, different meanings | "connection" means both a saved credential and a live socket | List both usages; ask which meaning should be canonical |
| Synonym collision — different words, same concept | "run" vs "execution" vs "flow run" | Identify the preferred term; mark the others as aliases to avoid |
| Undefined jargon — term used but never defined | "piece" first appears without explanation | Ask for a one-sentence definition |
Do not silently resolve ambiguities — always confirm with the user.
3c. Write or update .agents/features/GLOSSARY.md
Create or update this file as the central domain glossary. Structure it as follows:
# Domain Glossary — Activepieces
> Last updated: <date>
## <Domain Cluster Name>
| Term | Definition (one sentence) | Aliases to avoid | Related terms |
|---|---|---|---|
| Flow | A named automation consisting of a trigger and one or more steps. | workflow, automation, pipeline | Step, Trigger, Run |
| ... | ... | ... | ... |
## <Next Domain Cluster Name>
...
Formatting rules:
- Group terms into domain clusters (e.g., Automation Core, Platform & Multi-tenancy, Pieces & Integrations, Tables & Data, Authentication).
- Each definition is one sentence only — no exceptions. If a concept needs more explanation, link to a doc or ADR.
- The "Aliases to avoid" column lists terms that have been seen in the codebase or conversation but should be retired in favour of the canonical term.
- The "Related terms" column lists other glossary entries that are closely connected.
- Keep terms in alphabetical order within each cluster.
3d. Canonical term enforcement
When writing or reviewing code, use only the canonical term from the glossary. If you see a deprecated alias in existing code, inform the user about each occurrence and let them decide whether to rename it now or track it as technical debt for later.
Step 4: RE-INVOCATION (when called again in the same conversation)
When this skill is triggered a second or subsequent time in the same session:
- Read the existing
.agents/features/ docs and GLOSSARY.md (do not recreate from scratch).
- Identify new terms or features introduced since the last invocation.
- Integrate new terms into the glossary, maintaining alphabetical order.
- Create or update feature docs as needed.
- Flag any fresh ambiguities or synonym collisions found in the new context.
- Present a diff summary to the user: which terms/features were added, updated, or flagged.
Quick Reference
| Task | Action |
|---|
| New feature requested | Run Step 1 (overlap detection via .agents/features/ + codebase search) — always |
| Feature implemented or modified | Update its .agents/features/<name>.md via Step 2 |
| New term encountered | Add to glossary via Step 3 |
| Ambiguity detected | Flag to user before resolving |
| Skill re-invoked | Follow Step 4 (incremental update) |
| Deprecated alias found in code | Inform user; let them decide to rename now or defer as tech debt |
Critical Reminders
- Feature overlap detection is not optional — check
.agents/features/ and the codebase before every new feature, no exceptions.
- Feature docs must stay current — every change to a feature's behavior requires an update to its
.agents/features/<name>.md.
- One-sentence definitions — longer definitions are a sign the concept needs to be split.
- Never resolve ambiguities silently — always confirm the canonical meaning with the user.
- Aliases to avoid are as important as definitions — they prevent synonym drift from creeping back into the codebase.
