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README

Deft

One-shot, anti-slop

A layered framework for AI-assisted development with consistent standards and workflows.

TL;DR

Deft is a SKILL.md that makes AI coding significantly more effective by providing consistent, hierarchical standards. Instead of repeating the same instructions in every AI session, you define your preferences once—from general coding style to project-specific rules—and AI agents follow them. The result: higher quality code, reproducible workflows, and AI that gets better over time by learning from your patterns.

Key benefits: No more "AI forgot my preferences", no more inconsistent code style across AI sessions, no more re-explaining your stack every time.

Don't have preferences yet? No problem—Deft ships with professional-grade defaults for Python, Go, TypeScript, C++, and common workflows. Use it out of the box and customize later.

Platform compatibility: If you're on a platform that doesn't yet support SKILL.md, just add a line to your AGENTS.md that says "See deft/main.md".

Context-efficient: Deft keeps AI context windows lean through RFC 2119-based notation (!, ~, ≉, ⊗) and lazy-loading—AI only reads the files relevant to the current task, not everything at once.

📍 Roadmap: See ROADMAP.md for the development timeline, open issues, and planned work.

📢 Cloned manually? Tell your agent: "Read deft/QUICK-START.md and follow it." It creates your project's AGENTS.md and starts the setup flow automatically.

🔄 Upgrading from a previous version? Read UPGRADING.md before proceeding.
Agents: ! Read UPGRADING.md on the first session after a framework update.

⬇️ Get Deft: Download the installer for your platform from GitHub Releases, run it, and follow the prompts. See Getting Started below.

🚀 Getting Started

Download the installer for your platform from GitHub Releases, run it, and follow the prompts.

⬇️ Quick Download -- direct binaries from the latest GitHub Release:

1. Install Deft

Windows:

  • Download install-windows-amd64.exe (or install-windows-arm64.exe for Surface / Copilot+ PCs)
  • Run the downloaded file -- Windows SmartScreen may warn about an unrecognised publisher; click "More info" then "Run anyway" (code signing is planned for a future release)

macOS:

  • Download install-macos-universal -- works on all Macs (Intel and Apple Silicon)
  • Make it executable and run: 
    chmod +x install-macos-universal && ./install-macos-universal
  • If macOS Gatekeeper blocks the file: right-click then Open, or remove the quarantine attribute first (code signing is planned for a future release): 
    xattr -d com.apple.quarantine install-macos-universal

Linux:

  • Download install-linux-amd64 (or install-linux-arm64 for Raspberry Pi / ARM cloud)
  • Make it executable and run: 
    chmod +x install-linux-amd64 && ./install-linux-amd64

The installer guides you through choosing a project directory, installs git if needed, clones deft, wires it into AGENTS.md, and creates your user config directory.

Manual clone (no installer): If you clone deft directly via git clone, tell your agent: "Read deft/QUICK-START.md and follow it." It creates your project's AGENTS.md and starts the setup flow automatically.

Building from source (developers only): requires Go 1.22+

go run ./cmd/deft-install/

2. Set Up Your Preferences

Deft offers two setup paths that produce the same output (USER.md + vbrief/PROJECT-DEFINITION.vbrief.json) but adapt to different users:

Agent-driven (recommended for most users) — Tell your agent read AGENTS.md and follow it to start the Deft setup flow. The agent will ask how technical you are and adapt accordingly:

  • Technical: asks about languages, strategy, coverage, meta rules, and custom rules
  • Some opinions: asks name, languages, and custom rules; defaults the rest
  • Just pick defaults: asks what you're building, infers everything else

CLI (for technical users) — If you're running commands in a terminal, you're technical. The CLI treats you as a power user and asks all configuration questions directly — no skill-level gate.

deft/run bootstrap       # Interactive setup for USER.md and PROJECT-DEFINITION.vbrief.json

User config location:

  • Unix / macOS: ~/.config/deft/USER.md
  • Windows: %APPDATA%\deft\USER.md
  • Override: set DEFT_USER_PATH environment variable

3. Generate a Scope vBRIEF

deft/run bootstrap can chain into the scope-vBRIEF interview, or create one anytime:

deft/run spec            # AI-assisted interview -> vbrief/proposed/YYYY-MM-DD-<slug>.vbrief.json

The interview writes a scope vBRIEF to vbrief/proposed/ as YYYY-MM-DD-<slug>.vbrief.json. vbrief/*.vbrief.json files are the source of truth; .md files (PRD.md, SPECIFICATION.md, ROADMAP.md) are rendered views generated on demand via task *:render. Direct edits to the rendered .md files are overwritten on the next render -- edit the underlying .vbrief.json instead.

Other commands:

deft/run reset           # Reset config files
deft/run validate        # Check deft configuration
deft/run doctor          # Check system dependencies
deft/run upgrade         # Record the current framework version after updating deft

4. Build With AI

Ask your AI to build the product/project from your scope vBRIEFs and away you go:

Read vbrief/PROJECT-DEFINITION.vbrief.json and the scope vBRIEFs in
vbrief/active/ (or vbrief/pending/ if none are active yet) and implement
the project following deft/main.md standards.

Brownfield adoption: Adding Deft to an existing project with pre-v0.20 SPECIFICATION.md / PROJECT.md? See docs/BROWNFIELD.md for the migration path (task migrate:vbrief) and what to expect.

🎸 From Vibe to Virtuoso

AGENTS.md is great for vibe-coding—loose guidance, good enough for quick work:

"Make it clean, I like tests, use TypeScript."

Deft is for when you want virtuoso results: precise standards, reproducible workflows, and AI that improves over time.

Vibe (AGENTS.md) Virtuoso (Deft)
All rules in one file Modular—load only what's relevant
Gets bloated across languages/tools Scales cleanly (python.md stays focused)
Same context loaded every session Lazy-loading saves tokens
Preferences mixed with standards Clear separation (user.md vs language files)
No evolution mechanism Meta files capture learnings automatically
Starts fresh each project Portable across projects

When to use which:

  • Your AGENTS.md is under 200 lines and you work in one language? Vibe is fine.
  • It's growing unwieldy, you're repeating yourself, or you want consistent quality across projects? Deft pays off.

Same instrument, different mastery.

⚙️ Platform Requirements

GitHub is the primary supported SCM platform. Skills that interact with issues and PRs (deft-directive-sync, deft-directive-swarm, deft-directive-review-cycle, deft-directive-refinement) require the GitHub CLI (gh) to be installed and authenticated. Core framework features (setup, build, rendering, validation) work independently of any SCM platform.

The migration script (task migrate:vbrief) defaults origin provenance to github-issue type. Non-GitHub users should manually adjust references[].type in generated vBRIEFs after migration.

📦 Document Generation & vBRIEF Tooling

Deft provides deterministic task commands for rendering, migrating, and validating documents:

Command Description When to use
task spec:render Regenerate SPECIFICATION.md from specification.vbrief.json After editing the spec vBRIEF
task prd:render Export plan.narratives from specification.vbrief.json to a read-only PRD.md for stakeholder review On demand, when a stakeholder wants a PRD-style export
task roadmap:render Regenerate ROADMAP.md from vbrief/pending/ scope vBRIEFs After promoting/demoting scopes
task project:render Regenerate PROJECT-DEFINITION.vbrief.json items registry After scope lifecycle changes
task migrate:vbrief Migrate existing projects to vBRIEF lifecycle folder structure One-time cutover from pre-v0.20 model
task issue:ingest -- <N> Ingest a single GitHub issue as a scope vBRIEF in vbrief/proposed/ (deduplicates via existing references) After filing a new issue you plan to work on
task issue:ingest -- --all [--label L] [--status S] [--dry-run] Bulk-ingest all open issues into scope vBRIEFs Post-refactor / post-release cleanup, or when reducing the reconcile unlinked backlog
task vbrief:validate Validate vBRIEF schema, filenames, folder/status consistency Pre-commit (runs as part of task check)

See commands.md for the full change lifecycle and the Command Lifecycle: run vs task section there for detailed usage.

Ingesting GitHub issues

Post-v0.20, new GitHub issues become scope vBRIEFs via task issue:ingest:

# Single issue -- writes vbrief/proposed/YYYY-MM-DD-<N>-<slug>.vbrief.json
task issue:ingest -- 123

# Bulk ingest all open issues carrying the `bug` label, dry-run first
task issue:ingest -- --all --label bug --dry-run
task issue:ingest -- --all --label bug

The script deduplicates against existing references[type=github-issue] entries in vbrief/, writes to the lifecycle folder selected by --status proposed|pending|active (default: proposed), and exits with 1 if the issue already has a scope vBRIEF. Use --dry-run in bulk mode to preview without writing files.

Command Lifecycle: run vs task

Deft uses two complementary command surfaces:

  • run commands (deft/run bootstrap, deft/run spec, deft/run validate) handle interactive creation — bootstrapping user/project config, conducting spec interviews, validating configuration. These are the entry points for humans starting new work.
  • task commands (task spec:render, task roadmap:render, task migrate:vbrief, etc.) handle scripted rendering, migration, and validation — deterministic operations that transform vBRIEF source files into readable artifacts or enforce structural rules.

This split is intentional: run commands are conversational and agent-friendly; task commands are deterministic and CI-friendly. For the full document lifecycle, start with run to create, then use task to render and validate. See commands.md for cross-references.

🎯 What is Deft?

Deft is a structured approach to working with AI coding assistants that provides:

  • Consistent coding standards across languages and projects
  • Reproducible workflows via task-based automation
  • Self-improving guidelines that evolve with your team
  • Hierarchical rule precedence from general to project-specific
  • Lazy loading - only read files relevant to current task (see REFERENCES.md)

📝 Notation Legend

Deft uses compact notation for requirements:

  • ! = MUST (required, mandatory)
  • ~ = SHOULD (recommended, strong preference)
  • ≉ = SHOULD NOT (discouraged, avoid unless justified)
  • ⊗ = MUST NOT (forbidden, never do this)

This notation appears in technical standard files (python.md, go.md, etc.) for scanability. Based on RFC 2119.

📚 The Layers

Deft uses a layered architecture where more specific rules override general ones:

flowchart TD
    subgraph precedence ["Rule Precedence (top = highest)"]
        direction TB
        U["👤 USER.md<br/><i>Personal preferences</i>"]
        P["📁 PROJECT-DEFINITION.vbrief.json<br/><i>Project identity + rules</i>"]
        L["🐍 python.md / go.md / etc.<br/><i>Language standards</i>"]
        T["🔧 taskfile.md<br/><i>Tool guidelines</i>"]
        M["🤖 main.md<br/><i>General AI behavior</i>"]
        S["📋 vbrief/specification.vbrief.json<br/><i>Project requirements</i>"]
    end

    U --> P
    P --> L
    L --> T
    T --> M
    M --> S

    style U fill:#4ade80,stroke:#166534,color:#000
    style P fill:#60a5fa,stroke:#1e40af,color:#000
    style L fill:#facc15,stroke:#a16207,color:#000
    style T fill:#fb923c,stroke:#c2410c,color:#000
    style M fill:#c084fc,stroke:#7c3aed,color:#000
    style S fill:#94a3b8,stroke:#475569,color:#000

📁 Directory Structure

deft/
├── README.md              # This file
├── CHANGELOG.md           # Release history
├── CONTRIBUTING.md        # Contributor bootstrap guide
├── LICENSE.md             # MIT License
├── PROJECT.md             # Project-level configuration (deprecated -- see PROJECT-DEFINITION.vbrief.json)
├── REFERENCES.md          # Lazy-loading reference system
├── ROADMAP.md             # Development timeline
├── SKILL.md               # Entry point for AI agents
├── main.md                # Entry point - general AI guidelines
├── commands.md            # Available commands
├── Taskfile.yml           # Task automation
├── run.bat                # Windows task runner shim
│
├── cmd/                   # Go installer source
│   └── deft-install/      # Cross-platform installer wizard
│
├── coding/                # Coding standards
│   ├── coding.md          # General coding guidelines
│   └── testing.md         # Testing standards
│
├── context/               # Context management strategies
│   ├── context.md         # Overview
│   ├── deterministic-split.md
│   ├── examples.md
│   ├── fractal-summaries.md
│   ├── long-horizon.md
│   ├── spec-deltas.md
│   ├── tool-design.md
│   └── working-memory.md
│
├── contracts/             # Interface contracts
│   ├── boundary-maps.md   # Produces/consumes between slices
│   └── hierarchy.md       # Dual-hierarchy framework (durability + generative axes)
│
├── core/                  # Core framework files
│   ├── glossary.md        # Terminology definitions
│   ├── project.md         # Project template
│   ├── ralph.md           # Ralph loop concept
│   ├── user.md            # Legacy; now ~/.config/deft/USER.md or %APPDATA%\deft\USER.md
│   └── versioning.md      # Versioning guidelines
│
├── deployments/           # Platform-specific deployment guidance
│   ├── README.md          # Deployment overview
│   ├── agentuity/         # Agentuity platform
│   ├── aws/               # AWS (Lambda, ECS, App Runner, EB)
│   ├── azure/             # Azure (App Service, Functions, AKS, Container Apps)
│   ├── cloudflare/        # Cloudflare Workers/Pages
│   ├── cloud-gov/         # cloud.gov (FedRAMP)
│   ├── fly-io/            # Fly.io
│   ├── google/            # GCP (Cloud Run, Functions, App Engine, GKE)
│   ├── netlify/           # Netlify
│   └── vercel/            # Vercel
│
├── docs/                  # Documentation & articles
│   ├── ai-coding-trust-paradox.md
│   ├── BROWNFIELD.md       # Adding Deft to an existing project (brownfield adoption)
│   └── claude-code-integration.md
│
├── history/               # Plan archives and change logs
│   ├── archive/
│   └── changes/
│
├── interfaces/            # Interface types
│   ├── cli.md             # Command-line interfaces
│   ├── rest.md            # REST APIs
│   ├── tui.md             # Terminal UIs
│   └── web.md             # Web UIs
│
├── languages/             # Language-specific standards
│   ├── python.md, go.md, typescript.md, javascript.md
│   ├── cpp.md, c.md, csharp.md, rust.md, zig.md
│   ├── java.md, kotlin.md, swift.md, dart.md
│   ├── elixir.md, julia.md, r.md, sql.md
│   ├── delphi.md, visual-basic.md, vhdl.md
│   ├── 6502-DASM.md       # 6502 Assembly (DASM)
│   ├── markdown.md, mermaid.md
│   └── commands.md        # Language command reference
│
├── meta/                  # Meta/process files
│   ├── code-field.md      # Coding mindset
│   ├── ideas.md           # Future directions
│   ├── lessons.md         # Learnings
│   ├── morals.md          # Ethical guidelines
│   ├── SOUL.md            # Core philosophy
│   └── suggestions.md     # Improvements
│
├── platforms/             # Platform-specific standards
│   ├── 2600.md            # Atari 2600
│   └── unity.md           # Unity engine
│
├── resilience/            # Session continuity & recovery
│   ├── continue-here.md   # Interruption recovery protocol
│   └── context-pruning.md # Fresh context per task
│
├── scm/                   # Source control management
│   ├── changelog.md       # Changelog conventions
│   ├── git.md             # Git conventions
│   └── github.md          # GitHub workflows
│
├── skills/                # Agent skills (SKILL.md format)
│   ├── deft-directive-build/        # Build/implement skill
│   ├── deft-directive-interview/    # Deterministic structured Q&A interview
│   ├── deft-directive-pre-pr/       # Iterative pre-PR quality loop (RWLDL)
│   ├── deft-directive-refinement/   # Conversational backlog refinement
│   ├── deft-directive-review-cycle/ # Greptile bot review cycle
│   ├── deft-directive-setup/        # Interactive setup skill
│   ├── deft-directive-swarm/        # Parallel agent orchestration
│   └── deft-directive-sync/         # Session-start framework sync
│
├── specs/                 # Per-feature specifications
│   ├── testbed/           # QA testbed Phase 1 spec
│   └── strategy-chaining/ # Strategy chaining feature spec
│
├── strategies/            # Development strategies
│   ├── README.md          # Strategy overview
│   ├── brownfield.md      # Redirect → map.md (backward compat)
│   ├── discuss.md         # Discussion mode
│   ├── interview.md       # Interview-driven development (default)
│   ├── map.md             # Codebase mapping
│   ├── research.md        # Research mode
│   ├── speckit.md         # Specification toolkit
│   └── yolo.md            # Rapid prototyping
│
├── swarm/                 # Multi-agent coordination
│   └── swarm.md           # Swarm guidelines
│
├── taskfiles/             # Reusable Taskfile includes
│   └── deployments.yml    # Deployment tasks
│
├── templates/             # Templates and examples
│   ├── make-spec.md       # Spec generation guide
│   ├── make-spec-example.md
│   └── specification.md   # Project spec template
│
├── tests/                 # Test fixtures and snapshots
│   ├── content/snapshots/ # Content validation baselines
│   └── fixtures/          # Mock configs
│
├── tools/                 # Tooling and workflow
│   ├── RWLDL.md           # Read-Write-List-Delete-Link pattern
│   ├── taskfile.md        # Task automation
│   └── telemetry.md       # Observability
│
├── vbrief/                # vBRIEF document model
│   ├── vbrief.md          # Canonical vBRIEF usage reference
│   ├── PROJECT-DEFINITION.vbrief.json  # Project identity gestalt
│   ├── proposed/           # Scope vBRIEFs: ideas, not committed to
│   ├── pending/            # Scope vBRIEFs: accepted backlog
│   ├── active/             # Scope vBRIEFs: in progress
│   ├── completed/          # Scope vBRIEFs: done
│   ├── cancelled/          # Scope vBRIEFs: rejected/abandoned
│   └── schemas/           # JSON schemas
│
└── verification/          # Agent work verification
    ├── verification.md    # 4-tier verification ladder
    ├── integration.md     # Integration testing
    ├── plan-checking.md   # Plan validation
    └── uat.md             # User acceptance testing

🔧 Core Files

main.md - Entry point, general AI guidelines
SKILL.md - Entry point for AI agent skill loading
coding/coding.md - Software development standards
coding/testing.md - Testing standards
vbrief/PROJECT-DEFINITION.vbrief.json - Project identity gestalt (replaces PROJECT.md)
USER.md - Your personal preferences (highest precedence) -- ~/.config/deft/USER.md (Unix/macOS) or %APPDATA%\deft\USER.md (Windows)

🐍 Languages

languages/ contains standards for 20+ languages including:
python.md - Python (≥85% coverage, mypy strict, ruff/black)
go.md - Go (≥85% coverage, Testify)
typescript.md / javascript.md - TS/JS (strict mode, Vitest)
cpp.md / c.md / csharp.md - C family rust.md / zig.md - Systems languages
java.md / kotlin.md / swift.md / dart.md - Mobile/JVM
elixir.md / julia.md / r.md / sql.md - Specialized
markdown.md / mermaid.md - Documentation formats
Plus: delphi, visual-basic, vhdl, 6502-DASM

💻 Interfaces

interfaces/cli.md - Command-line interface patterns
interfaces/rest.md - REST API design
interfaces/tui.md - Terminal UI (Textual, ink)
interfaces/web.md - Web UI (React, Tailwind)

🎮 Platforms

platforms/2600.md - Atari 2600 development
platforms/unity.md - Unity engine standards

🛠️ Tools

tools/taskfile.md - Task automation best practices
tools/telemetry.md - Logging, tracing, metrics
tools/RWLDL.md - Read-Write-List-Delete-Link pattern

📂 SCM

scm/git.md - Commit conventions, safety
scm/github.md - GitHub workflows
scm/changelog.md - Changelog conventions

🐝 Swarm

swarm/swarm.md - Multi-agent coordination patterns

🧭 Strategies

strategies/ - Development approach strategies:
interview.md / discuss.md / map.md / research.md / speckit.md / yolo.md / brownfield.md (redirect to map.md)

🧠 Context

context/context.md - Context management overview
context/fractal-summaries.md / working-memory.md / long-horizon.md / deterministic-split.md / spec-deltas.md / tool-design.md / examples.md

✅ Verification

verification/verification.md - 4-tier verification ladder, must-haves, stub detection
verification/integration.md - Integration testing standards
verification/plan-checking.md - Plan validation
verification/uat.md - Auto-generated user acceptance test scripts

🛡️ Resilience

resilience/continue-here.md - Interruption recovery protocol (vBRIEF-based)
resilience/context-pruning.md - Fresh context per task, eliminating context rot

📋 vBRIEF

vbrief/vbrief.md - Canonical vBRIEF usage reference (file taxonomy, lifecycle folders, scope vBRIEFs)
vbrief/schemas/ - JSON validation schemas
vbrief/PROJECT-DEFINITION.vbrief.json - Project identity gestalt
vbrief/{proposed,pending,active,completed,cancelled}/ - Scope vBRIEF lifecycle folders

📜 Contracts

contracts/hierarchy.md - Dual-hierarchy framework (durability axis + generative axis)
contracts/boundary-maps.md - Explicit produces/consumes declarations between slices

🚀 Deployments

deployments/ - Deployment guides for 9 platforms:
agentuity, aws, azure, cloudflare, cloud-gov, fly-io, google, netlify, vercel

📖 Glossary

glossary.md - Canonical v0.20 vocabulary (Scope vBRIEF, lifecycle folder, canonical narrative keys, rendered export, source of truth, ...) -- one page under 150 lines.

🤖 Skills

skills/deft-directive-build/ - Build/implement skill skills/deft-directive-interview/ - Deterministic structured Q&A interview skill
skills/deft-directive-pre-pr/ - Iterative pre-PR quality loop (Read-Write-Lint-Diff-Loop) -- run before pushing a branch for PR creation
skills/deft-directive-refinement/ - Conversational backlog refinement (ingest, evaluate, promote/demote, prioritize)
skills/deft-directive-review-cycle/ - Greptile bot reviewer response workflow (fetch findings, batch fix, exit on clean)
skills/deft-directive-setup/ - Interactive setup wizard skill
skills/deft-directive-swarm/ - Parallel local agent orchestration (worktrees, prompts, monitoring, merge)
skills/deft-directive-sync/ - Session-start framework sync (submodule update, project validation)

📝 Templates

templates/make-spec.md - Specification generation
templates/specification.md - Project spec template

🧠 Meta

meta/code-field.md - Coding mindset and philosophy
meta/SOUL.md - Core philosophy
meta/morals.md - Ethical guidelines
meta/lessons.md - Codified learnings (AI-updatable)
meta/ideas.md - Future directions
meta/suggestions.md - Improvement suggestions

Rule Hierarchy

Rules cascade with precedence:

  1. USER.md (highest) - your personal overrides (~/.config/deft/USER.md on Unix/macOS, %APPDATA%\deft\USER.md on Windows)
  2. vbrief/PROJECT-DEFINITION.vbrief.json - project-specific rules and identity gestalt
  3. Language files (python.md, go.md) - language standards
  4. Tool files (taskfile.md) - tool guidelines
  5. main.md - general AI behavior
  6. vbrief/specification.vbrief.json + scope vBRIEFs (lowest) - requirements (rendered to SPECIFICATION.md via task spec:render)

Continuous Improvement

The deft process evolves over time:

flowchart TD
    subgraph evolution ["Continuous Evolution"]
        DEV["🛠️ Development<br/><i>Daily coding</i>"]
        LEARN["📚 lessons.md<br/><i>Patterns discovered</i>"]
        IDEAS["💡 ideas.md<br/><i>Future directions</i>"]
        SUGGEST["📝 suggestions.md<br/><i>Improvements</i>"]
        USER["👤 user.md<br/><i>Preferences</i>"]
        STANDARDS["📖 Language/Tool files<br/><i>Evolving standards</i>"]
    end

    DEV -->|"AI discovers"| LEARN
    DEV -->|"AI notes"| IDEAS
    DEV -->|"AI suggests"| SUGGEST
    LEARN -->|"Promote"| STANDARDS
    IDEAS -->|"Review"| STANDARDS
    SUGGEST -->|"Accept"| USER
    STANDARDS -->|"Inform"| DEV
    USER -->|"Guide"| DEV

    style DEV fill:#f0abfc,stroke:#a855f7,color:#000
    style LEARN fill:#fde68a,stroke:#d97706,color:#000
    style IDEAS fill:#a5f3fc,stroke:#06b6d4,color:#000
    style SUGGEST fill:#fecaca,stroke:#ef4444,color:#000
    style USER fill:#86efac,stroke:#22c55e,color:#000
    style STANDARDS fill:#c7d2fe,stroke:#6366f1,color:#000
  • AI updates lessons.md when learning better patterns
  • AI notes ideas in ideas.md for future consideration
  • AI suggests improvements in suggestions.md
  • You update your USER.md (~/.config/deft/USER.md on Unix/macOS, %APPDATA%\deft\USER.md on Windows) with new preferences
  • You update language/tool files as standards evolve

💡 Key Principles

Task-Centric Workflow with Taskfile

Why Taskfile?

Deft uses Taskfile as the universal task runner for several reasons:

  1. Makefiles are outdated: Make syntax is arcane, portability is poor, and tabs vs spaces causes constant friction
  2. Polyglot simplicity: When working across Python (make/invoke/poetry scripts), Go (make/mage), Node (npm scripts/gulp), etc., each ecosystem has different conventions. Taskfile provides one consistent interface
  3. Better than script sprawl: A /scripts directory with dozens of bash files becomes chaotic—hard to discover, hard to document, hard to compose. Taskfile provides discoverability (task --list), documentation (desc), and composition (deps)
  4. Modern features: Built-in file watching, incremental builds via checksums, proper error handling, variable templating, and cross-platform support

Usage:

task --list        # See available tasks
task check         # Pre-commit checks
task test:coverage # Run coverage
task dev           # Start dev environment

Test-Driven Development (TDD)

Deft embraces TDD as the default development approach:

flowchart LR
    subgraph cycle ["TDD Cycle"]
        R["🔴 RED<br/>Write failing test"]
        G["🟢 GREEN<br/>Make it pass"]
        B["🔵 REFACTOR<br/>Improve code"]
    end

    R -->|"Minimal code"| G
    G -->|"Clean up"| B
    B -->|"Next feature"| R

    style R fill:#fca5a5,stroke:#dc2626,color:#000
    style G fill:#86efac,stroke:#16a34a,color:#000
    style B fill:#93c5fd,stroke:#2563eb,color:#000
  1. Write the test first: Define expected behavior before implementation
  2. Watch it fail: Confirm the test fails for the right reason
  3. Implement: Write minimal code to make the test pass
  4. Refactor: Improve code quality while keeping tests green
  5. Repeat: Build features incrementally with confidence

Benefits:

  • Tests become specifications of behavior
  • Better API design (you use the API before implementing it)
  • High coverage naturally (≥85% is easy when tests come first)
  • Refactoring confidence
  • Living documentation

In Practice:

task test          # Run tests in watch mode during development
task test:coverage # Verify ≥75% coverage
task check         # Pre-commit: all quality checks including tests

Quality First

  • ≥85% test coverage (overall + per-module)
  • Always run task check before commits
  • Run linting, formatting, type checking
  • Never claim checks passed without running them

Spec-Driven Development (SDD)

Before writing any code, deft uses an AI-assisted specification process:

flowchart LR
    subgraph sdd ["Spec-Driven Development"]
        I["💡 Idea<br/><i>Initial concept</i>"]
        Q["❓ Interview<br/><i>AI asks questions</i>"]
        S["📋 vbrief/specification.vbrief.json<br/><i>Complete plan (source of truth)</i>"]
        D["👥 Development<br/><i>Parallel agents</i>"]
    end

    I -->|"make-spec.md"| Q
    Q -->|"Clarify ambiguity"| S
    S -->|"Independent tasks"| D

    style I fill:#fef08a,stroke:#ca8a04,color:#000
    style Q fill:#c4b5fd,stroke:#7c3aed,color:#000
    style S fill:#6ee7b7,stroke:#059669,color:#000
    style D fill:#7dd3fc,stroke:#0284c7,color:#000

The Process:

  1. Start with make-spec.md: A prompt template for creating specifications

    I want to build **\_\_\_\_** that has the following features:

1. Feature A
2. Feature B
3. Feature C

  2. AI Interview: The AI (Claude or similar) asks focused, non-trivial questions to clarify:

    • Missing decisions and edge cases
    • Implementation details and architecture
    • UX considerations and constraints
    • Dependencies and tradeoffs

    Each question includes numbered options and an "other" choice for custom responses.

  3. Generate a scope vBRIEF (and optionally vbrief/specification.vbrief.json via the Full path): Once ambiguity is minimized, the AI produces a comprehensive vBRIEF with:

    • Clear phases, subphases, and tasks
    • Dependency mappings (what blocks what)
    • Parallel work opportunities
    • No code—just the complete plan

    .md exports (SPECIFICATION.md, PRD.md) are generated views via task spec:render / task prd:render; the .vbrief.json files remain authoritative.

  4. Multi-Agent Development: The spec enables multiple AI coding agents to work in parallel on independent tasks

Why SDD?

  • Clarity before coding: Catch design issues early
  • Parallelization: Clear dependencies enable concurrent work
  • Scope management: Complete spec prevents scope creep
  • Onboarding: New contributors/agents understand the full picture
  • AI-friendly: Structured specs help AI agents stay aligned

Example: See templates/make-spec.md for the interview process template

Convention Over Configuration

  • Use Conventional Commits for all commits
  • Use hyphens in filenames, not underscores
  • Keep secrets in secrets/ directory
  • Keep docs in docs/, not project root

Safety and Reversibility

  • Never force-push without permission
  • Assume production impact unless stated
  • Prefer small, reversible changes
  • Call out risks explicitly

📖 Example Workflows

flowchart TB
    subgraph NewProject ["🆕 New Python Project"]
        direction TB
        NP1["AI reads main.md"] --> NP2["AI reads python.md"]
        NP2 --> NP3["AI reads taskfile.md"]
        NP3 --> NP4["Setup: pytest, ruff, black, mypy"]
        NP4 --> NP5["Configure: ≥85% coverage"]
        NP5 --> NP6["You customize: vbrief/PROJECT-DEFINITION.vbrief.json"]
    end
    
    subgraph ExistingGo ["📂 Existing Go Project"]
        direction TB
        EG1["AI reads USER.md"] --> EG2["AI reads vbrief/PROJECT-DEFINITION.vbrief.json"]
        EG2 --> EG3["AI reads go.md"]
        EG3 --> EG4["AI runs task check"]
        EG4 --> EG5["AI makes changes"]
    end
    
    subgraph Review ["🔍 Code Review"]
        direction TB
        CR1["AI reads quality standards"] --> CR2["task quality"]
        CR2 --> CR3["task test:coverage"]
        CR3 --> CR4["Check commits"]
        CR4 --> CR5["Update suggestions.md"]
    end

Starting a New Python Project

sequenceDiagram
    participant AI
    participant Files as Deft Files
    participant Project

    AI->>Files: Read main.md
    AI->>Files: Read python.md
    AI->>Files: Read taskfile.md
    AI->>Project: Setup pytest, ruff, black, mypy
    AI->>Project: Configure ≥85% coverage
    AI->>Project: Create Taskfile.yml
    Note over AI,Project: You customize project.md
  1. AI reads: main.md → python.md → taskfile.md
  2. AI sets up: pytest, ruff, black, mypy, Taskfile
  3. AI configures: ≥85% coverage, PEP standards
  4. You customize: vbrief/PROJECT-DEFINITION.vbrief.json with project specifics

Working on an Existing Go Project

sequenceDiagram
    participant AI
    participant Files as Deft Files
    participant Code

    AI->>Files: Read USER.md (your overrides)
    AI->>Files: Read vbrief/PROJECT-DEFINITION.vbrief.json
    AI->>Files: Read go.md
    AI->>Files: Read main.md
    AI->>Code: Run task check
    AI->>Code: Apply changes
    Note over AI,Code: Respects your USER.md preferences
  1. AI reads: USER.md → vbrief/PROJECT-DEFINITION.vbrief.json → go.md → main.md
  2. AI follows: go.dev/doc/comment, Testify patterns
  3. AI runs: task check before suggesting changes
  4. AI respects: your USER.md overrides

Code Review Session

sequenceDiagram
    participant AI
    participant Standards as Language File
    participant Tasks as Taskfile
    participant Meta as suggestions.md

    AI->>Standards: Reference quality standards
    AI->>Tasks: Run task quality
    AI->>Tasks: Run task test:coverage
    AI->>AI: Check Conventional Commits
    AI->>Meta: Log improvements
  1. AI references quality standards from language file
  2. AI runs task quality and task test:coverage
  3. AI checks Conventional Commits compliance
  4. AI suggests improvements → adds to suggestions.md

📝 Contributing to Deft

As you use deft, AI maintains three meta files that help the framework evolve:

lessons.md — Patterns discovered during development

## 2026-01-15: Testify suite setup
When using Testify in Go, always define `suite.Suite` struct with 
dependencies as fields, not package-level vars. Discovered during 
auth-service refactor—package vars caused test pollution.

## 2026-01-20: CLI flag defaults
For CLI tools, default to human-readable output, use `--json` flag 
for machine output. Users expect pretty by default.

ideas.md — Potential improvements for later

- [ ] Add `deft/run upgrade` command to pull latest deft without 
      losing local user.md/project.md customizations
- [ ] Consider `deft/interfaces/grpc.md` for protobuf/gRPC patterns
- [ ] Explore integration with cursor rules format

suggestions.md — Project-specific improvements

## auth-service
- The retry logic in `client.go` should use exponential backoff 
  (currently linear)—see coding.md resilience patterns

## api-gateway  
- Consider splitting routes.go (850 lines) into domain-specific 
  route files per coding.md file size guidelines

Review these periodically and promote good ideas to main guidelines

🚢 Release & Testing

The GitHub Actions workflow (.github/workflows/release.yml) builds installers for all 6 platform targets, creates a macOS universal binary, runs smoke tests on real hardware, and publishes a GitHub Release.

What the Smoke Tests Verify

Every build is tested on its native platform (including macos-latest and ubuntu-24.04-arm):

  • --version — binary executes and reports version
  • --help — flag parsing and usage output render correctly
  • --debug — correct OS and architecture detection (e.g. OS=darwin ARCH=arm64)
  • Wizard startup — binary initializes and prints the welcome banner
  • --branch <name> — branch flag is accepted without error
  • macOS universal binary contains both x86_64 and arm64 architectures

Testing Without Publishing

The workflow triggers on version tags (v*.*.*). To run a full build and smoke test without publishing a real release, push a disposable test tag from any branch:

# Tag the current HEAD
git tag v0.0.0-test.1
git push origin v0.0.0-test.1

# Monitor the workflow run
gh run list --workflow=release.yml -R deftai/directive
gh run watch <RUN_ID> -R deftai/directive

# Clean up after verifying
gh release delete v0.0.0-test.1 -R deftai/directive --yes
git push origin --delete v0.0.0-test.1
git tag -d v0.0.0-test.1

The workflow also includes a workflow_dispatch trigger for manual runs without publishing:

gh workflow run release.yml --ref <branch> -R deftai/directive

Manual runs skip the release job automatically (guarded by if: startsWith(github.ref, 'refs/tags/v')).

Release Process

  1. Merge the feature branch PR into master
  2. Tag master with a semantic version: 
    git checkout master
git pull origin master
git tag v1.2.3
git push origin v1.2.3
  3. The workflow runs automatically: build → universal-macos → smoke-test → release
  4. Verify the published release at https://github.com/deftai/directive/releases
  5. Each release includes: install-windows-amd64.exe, install-windows-arm64.exe, install-macos-universal, install-linux-amd64, install-linux-arm64

Note: Binaries are not yet code-signed. macOS users may need to bypass Gatekeeper (see Getting Started). Windows users may see a SmartScreen warning. Code signing is planned for a future release.

📦 Your Artifacts

When you use Deft in a consumer project, these are the key locations for user-generated artifacts:

  • ./vbrief/ -- vBRIEF document root
    • PROJECT-DEFINITION.vbrief.json -- project identity gestalt (replaces PROJECT.md)
    • plan.vbrief.json -- session-level tactical plan; carries planRef to scope vBRIEFs
    • continue.vbrief.json -- interruption checkpoint (ephemeral)
    • specification.vbrief.json -- project spec source of truth
    • proposed/, pending/, active/, completed/, cancelled/ -- scope vBRIEF lifecycle folders (individual units of work as YYYY-MM-DD-slug.vbrief.json)
  • USER.md -- personal preferences (~/.config/deft/USER.md on Unix/macOS, %APPDATA%\deft\USER.md on Windows)
  • ./deft/ -- installed framework files (cloned or installed by the installer)

🎓 Philosophy

Deft embodies:

  • Correctness over convenience: Optimize for long-term quality
  • Standards over flexibility: Consistent patterns across projects
  • Evolution over perfection: Continuously improve through learning
  • Clarity over cleverness: Direct, explicit, maintainable code

Next Steps: Read main.md for comprehensive AI guidelines, then download the installer for your platform to get started.

Copyright © 2025-2026 Jonathan "visionik" Taylor — https://deft.md
Licensed under the MIT License

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Path Synopsis
cmd
deft-install command

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