Add LLM.md support for Google Antigravity workflows

[manaskhuman]

First of all, GSD is an amazing system. It solves a lot of the reliability problems with vibecoding and spec-driven workflows.

While using it with Google Antigravity, I noticed that the current workflow relies heavily on remembering and manually invoking slash commands like:

/gsd:new-project

/gsd:discuss-phase

/gsd:plan-phase

/gsd:execute-phase

/gsd:verify-work

For longer sessions this becomes difficult to execute consistently.

Suggestion

It would be very helpful if GSD supported an optional LLM.md file in the project root that provides machine-readable workflow guidance for AI agents.

Example use cases:

Define the correct command order

Provide execution rules

Give project-specific guidance

Improve compatibility with tools like Google Antigravity

Example idea:

LLM.md

GSD Workflow Instructions

Core flow:

1. /gsd:new-project
2. /gsd:discuss-phase N
3. /gsd:plan-phase N
4. /gsd:execute-phase N
5. /gsd:verify-work N

Use /gsd:quick for small tasks.
Run /gsd:map-codebase if the project already has code.
Benefits

Easier onboarding for new users

Less reliance on memorizing commands

Better compatibility with AI runtimes

Works well with tools like Google Antigravity

Would love to hear thoughts on this. It could make the system even smoother to use with AI agents.