tomorrow

tomorrow is a skill for Claude Code from rana/skills. It costs 41 tokens per session (412 once invoked), scanned A, original, MIT.

A set of notes written for the person who will maintain a project later. It records confusing code, magic values, ordering requirements, fragile areas, workarounds, and reasons that may otherwise be forgotten.

In plain words
What is it for?
Use it after changes or while investigating a focus area to document future maintenance risks, hidden assumptions, and dependency-specific pitfalls.
Why use it?
It preserves practical context that ordinary reference documentation often leaves out, reducing the chance of breaking something that looks unusual but is intentional.

Skill for Claude Code

Written for Claude Code: argument-hint in frontmatter. Also seen: mentions CLAUDE.md.

Part of the y plugin — 64 skills, 14 commands, 8 agents shipped together

Good fit Use it after changes or while investigating a focus area to document future maintenance risks, hidden assumptions, and dependency-specific pitfalls.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/rana/skills/tomorrow
View source ↗ rana/skills
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.

Any agent
npx skills add rana/skills --skill tomorrow
Clone the repo
git clone --depth 1 https://github.com/rana/skills

Made for: Claude Code.

Or install y, the plugin that ships this one along with the rest of its 64 skills, 14 commands, 8 agents.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for tomorrow

README.md
[![agentmods](https://agentmods.dev/badge/skills/rana/skills/tomorrow/github.svg)](https://agentmods.dev/skills/rana/skills/tomorrow)
Your own site
<a href="https://agentmods.dev/skills/rana/skills/tomorrow"><img src="https://agentmods.dev/badge/skills/rana/skills/tomorrow/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for tomorrow

Your own site · 80×15
<a href="https://agentmods.dev/skills/rana/skills/tomorrow"><img src="https://agentmods.dev/badge/skills/rana/skills/tomorrow.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 41 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 412 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00041 $0.00412
Opus 5.5 $0.00016 $0.00165
Sonnet 5.5 $0.00008 $0.00082
Haiku 4.5 $0.00004 $0.00041

Measured 1mo ago against content hash 198f098ae590, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

tomorrow 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 1mo 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.

skills/tomorrow/SKILL.md · 37 lines

What it actually says

Examine the codebase, recent changes, and project documents.

Tomorrow Notes

Capture what future-you needs to know:

  1. The non-obvious — What code looks wrong but is actually correct? What workarounds exist and why? What would you "fix" if you didn't know the context?
  2. Magic values — Numbers, strings, thresholds, or timeouts that look arbitrary but have specific reasons. Document the reason, not just the value.
  3. Implicit ordering — Things that must happen in a specific order but nothing enforces it. Initialization sequences, migration steps, deployment procedures.
  4. Fragile spots — Code that works but will break if touched the wrong way. Areas where a reasonable-looking change would cause subtle bugs.
  5. Context that will evaporate — Why was this approach chosen over the obvious alternative? What did you try that didn't work? What constraints existed that might not be apparent?
  6. Dependency knowledge — Library quirks, API behaviors, platform-specific gotchas that you learned the hard way.
  7. The dragons — Areas where "here be dragons" is the honest documentation. What should future-you approach with extreme caution?

Focus area: $ARGUMENTS

For every note:

  1. What the thing is
  2. Why it matters (what breaks or confuses without this knowledge)
  3. Where to put the note (inline comment, CLAUDE.md, dedicated doc)

Present as an action list of notes to add. No changes to files — document only.

Output

Order by "what would confuse future-you most." State the total count when complete.

What questions would I benefit from asking?

What am I not asking?

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. 1mo ago First seen · 37 lines · 41 tokens per session scan A 198f098ae590

Subscribe to this mod's changes

tomorrow is a skill published in the GitHub repository rana/skills (1 stars, last pushed 6mo ago), licensed MIT. It adds 41 tokens to every session and 412 once invoked, about $0.0002 per session on Opus 5.5. 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 2026-09-03.

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