/sdlc

A command that shows what to do in the current phase of a software project. SDLC means software development life cycle, the stages used to plan, build, test, and deliver software.

In plain words
What is it for?
It helps identify the current phase, find the next action, show which commands or skills to use, and check whether required project files exist.
Why use it?
It turns the project's saved phase and configuration into a short list of next steps and required outputs.

Command

Part of the claude-code-mastery plugin — 1 skill, 12 commands, 3 agents shipped together

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.

agentmods
npx agentmods add commands/mckruz/claude-code-mastery/sdlc
Clone the repo
git clone --depth 1 https://github.com/MCKRUZ/claude-code-mastery

Or install claude-code-mastery, the plugin that ships this one along with the rest of its 1 skill, 12 commands, 3 agents.

Per session 28 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 625 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original 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 $0.00028 $0.00625
Opus 5 $0.00014 $0.00313
Sonnet 5 $0.00006 $0.00125
Haiku 4.5 $0.00003 $0.00063

Measured 3d ago against content hash 8940a53023a3, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

/sdlc 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 3d 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.

cursor-export/commands/sdlc.md · 73 lines

How it starts

The opening of the file, as written. The whole thing — 73 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/sdlc - Phase Guidance

Show guidance for the current SDLC phase including what to do, which skills to use, and what artifacts to produce.

Workflow

  1. Locate state file: Look for .sdlc/state.yaml in the current project directory. If not found, tell the user to run /sdlc-setup first and exit.

  2. Read state: Load .sdlc/state.yaml to get current_phase.

  3. Load phase definition: Read the phase definition file from phases/XX-phasename.md (where XX is the zero-padded phase number).

  4. Load profile: Read .sdlc/profile.yaml to get stack and quality configuration.

  5. Display phase context:

    Header

    Phase {N}: {Name}
    Profile: {profile_id}
    

    Purpose

    One-line description of this phase's goal.

    What to Do Next

    Based on the phase workflow steps and current artifact state:

    • List the next actionable step
    • Reference the specific skill/command to use
    • Example: "Run /plan to decompose your problem statement into requirements"

    Required Artifacts

    List artifacts needed to pass exit gates, with status:

    • artifact.md (exists, 1.2KB)
    • other-artifact.md (missing)

    Skills to Use

    List primary and secondary skills for this phase with brief description.

    Exit Criteria

    Summarize what must be true to advance (from phase definition's exit criteria).

    Quick Commands

    /sdlc-setup   - Initialize SDLC for a project
    
  6. Compliance callout: If the profile has compliance frameworks, note any compliance-specific requirements for this phase.

  7. Be concise. The phase definition file has full details -- this command shows the actionable summary, not the full document.

Arguments

  • No arguments: show guidance for current phase
  • <phase-number>: show guidance for a specific phase (e.g., /sdlc 3)

SDLC Sub-Commands

The full SDLC lifecycle includes these additional sub-commands (not yet ported to Cursor -- available in Claude Code):

Read the full file on GitHub · 73 lines

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. 3d ago First seen · 73 lines · 28 tokens per session scan A 8940a53023a3

Subscribe to this mod's changes

/sdlc is a command published in the GitHub repository MCKRUZ/claude-code-mastery (11 stars, last pushed 4mo ago), licensed MIT. It adds 28 tokens to every session and 625 once invoked, about $0.0001 per session on Opus 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.