Database Scout
zebbern/claude-code-guide
Explore SQLite and PostgreSQL databases: list tables, inspect schemas (columns/types/constraints), preview data, generate Mermaid ER diagrams, and run safe read-only queries.
How to change, persist, migrate and recover Nexus data without losing it.
Install Nexus Storage
$ npx skills add ProfSynapse/nexus --skill nexus-storage -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install ProfSynapse/nexus nexus-storage --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/ProfSynapse/nexus.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.skills/nexus-storage .claude/skills/nexus-storage && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "nexus-storage" agent skill from https://github.com/ProfSynapse/nexus/tree/main/.skills/nexus-storage into .claude/skills/nexus-storage/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "nexus-storage", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/ProfSynapse/nexus/tree/main/.skills/nexus-storageType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add ProfSynapse/nexus --skill nexus-storage -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install ProfSynapse/nexus nexus-storage --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ProfSynapse/nexus.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.skills/nexus-storage .agents/skills/nexus-storage && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "nexus-storage" agent skill from https://github.com/ProfSynapse/nexus/tree/main/.skills/nexus-storage into .agents/skills/nexus-storage/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "nexus-storage", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add ProfSynapse/nexus --skill nexus-storage -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install ProfSynapse/nexus nexus-storage --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ProfSynapse/nexus.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.skills/nexus-storage .cursor/skills/nexus-storage && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "nexus-storage" agent skill from https://github.com/ProfSynapse/nexus/tree/main/.skills/nexus-storage into .cursor/skills/nexus-storage/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "nexus-storage", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/ProfSynapse/nexus.git --path .skills/nexus-storage--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add ProfSynapse/nexus --skill nexus-storage -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install ProfSynapse/nexus nexus-storage --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ProfSynapse/nexus.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.skills/nexus-storage .gemini/skills/nexus-storage && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "nexus-storage" agent skill from https://github.com/ProfSynapse/nexus/tree/main/.skills/nexus-storage into .gemini/skills/nexus-storage/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "nexus-storage", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install ProfSynapse/nexus nexus-storageInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add ProfSynapse/nexus --skill nexus-storage -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/ProfSynapse/nexus.git skills-src && mkdir -p .github/skills && cp -r skills-src/.skills/nexus-storage .github/skills/nexus-storage && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "nexus-storage" agent skill from https://github.com/ProfSynapse/nexus/tree/main/.skills/nexus-storage into .github/skills/nexus-storage/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "nexus-storage", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add ProfSynapse/nexus --skill nexus-storage -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install ProfSynapse/nexus nexus-storage --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ProfSynapse/nexus.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.skills/nexus-storage .opencode/skills/nexus-storage && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "nexus-storage" agent skill from https://github.com/ProfSynapse/nexus/tree/main/.skills/nexus-storage into .opencode/skills/nexus-storage/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "nexus-storage", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
nexus-storage- GitHub stars
- 156
- Token cost
- ~749 tokens
- SKILL.md length
- 354 words
- Files
- 11 (incl. scripts, references)
- Skills in repo
- 12
- Repo updated
- First seen
- Licence
- MIT
At a glance
How to change, persist, migrate and recover Nexus data without losing it.
- Works in 6 steps: Pick the job and open its protocol… → Read references/storage-model.md before… → NEVER hardcode a storage root, and NEVER… → …
- Adding a SQLite table
- SKILL.md covers Workflow, Map and Siblings
- Runs Python scripts from its folder; calls python3
What it does
Nexus Storage is an agent skill from ProfSynapse/nexus. How to change, persist, migrate and recover Nexus data without losing it. Use when adding a SQLite table or column, persisting anything that must survive a restart or a cache rebuild, resolving a vault or plugin storage path, or debugging missing, stale, duplicated or post-rebuild-vanished data.
Its SKILL.md is about 750 tokens, which your agent loads only when the skill is triggered. The skill folder holds 13 other files, including scripts and reference files (for example `protocols/change-schema.md`, `protocols/diagnose-storage.md` and `protocols/persist-new-data.md`).
It sits in Databases. It works with SQLite. The licence is MIT.
When your agent uses it
- Adding a SQLite table
- Persisting anything that must survive a restart
- A cache rebuild
- Resolving a vault
Example prompts
- “/nexus-storage”
Requirements
- Python 3
Workflow steps
6 steps, taken from the first numbered list in SKILL.md.
- Pick the job and open its protocol before editing anything
- Read references/storage-model.md before writing any persistence code. It
- NEVER hardcode a storage root, and NEVER treat SQLite as authoritative. Resolve
- If you touched SchemaMigrator.ts or schema.ts, run
- Verify at runtime, not just statically. Every protocol here ends in a
- At the end of a session that used this skill, run protocols/self-refine.md.
What it can do on your machine
Read from SKILL.md and the folder at commit f48a4ea. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Ships 1 file in scripts/ (Python), which the agent can run.
Shell commands in SKILL.md call:
python3
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Nexus Storage loads about 749 tokens when it runs, and up to ~8.8k if it reads all its reference files. Until then it costs about 78 tokens; SKILL.md has 354 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); the scripts in this folder are not scanned.
SKILL.md
The full file from ProfSynapse/nexus at commit f48a4ea, republished under its MIT licence (© ProfSynapse). 354 words, ~749 tokens.
Download SKILL.mdSave it as
.claude/skills/nexus-storage/SKILL.md (or your agent's skills folder). This skill also uses 10 other files; get the full folder from GitHub.- name
- nexus-storage
- description
- How to change, persist, migrate and recover Nexus data without losing it. Use when adding a SQLite table or column, persisting anything that must survive a restart or a cache rebuild, resolving a vault or plugin storage path, or debugging missing, stale, duplicated or post-rebuild-vanished data.
Nexus Storage
Nexus stores data twice on purpose. The sharded JSONL event store is the source of truth; SQLite is a cache that is deleted and replayed on demand. Almost every storage bug in this repo is a write that landed on the wrong side of that line, or a read that ran before the cache was ready.
This router points at the procedure for your job. Working from the router alone is how the three-place schema change becomes a two-place one.
Workflow
Pick the job and open its protocol before editing anything:
Your job Protocol Add or change a SQLite table, column or index protocols/change-schema.mdPersist a new kind of data, or make a write survive restart protocols/persist-new-data.mdData is missing, stale, duplicated, slow, or vanished after a rebuild protocols/diagnose-storage.mdRead
references/storage-model.mdbefore writing any persistence code. It states the three invariants that decide whether a design is legal here. A change that breaks one is a data-loss bug that unit tests will happily pass.NEVER hardcode a storage root, and NEVER treat SQLite as authoritative. Resolve roots through the resolvers named in
references/paths-and-layout.md, and write through a repository so the event lands in JSONL first.If you touched
SchemaMigrator.tsorschema.ts, runscripts/check_schema_consistency.pyfrom the repo root and treat a non-zero exit as a stop:bash python3 .claude/skills/nexus-storage/scripts/check_schema_consistency.py .Verify at runtime, not just statically. Every protocol here ends in a verification step that a static check cannot substitute for — schema changes fail on the upgrade path and the fresh-install path independently, and cache bugs only appear after a real rebuild.
At the end of a session that used this skill, run
protocols/self-refine.md.
Show full SKILL.md (77 more words)Show less
Map
protocols/— the procedures: change-schema, persist-new-data, diagnose-storage, self-refine.references/— read on demand:storage-model.md(invariants and rebuild semantics),paths-and-layout.md(roots, resolvers, on-disk shapes, cache backends),schema-rules.md(what a migration may and may not do),failure-modes.md(symptom → cause → fix).scripts/check_schema_consistency.py— proves the three schema definitions agree. Run it; do not eyeball them.
Siblings
Storage only. Mobile-safe imports and vault-path confinement are nexus-mobile-compat;
test lanes and the in-app verification loop are nexus-testing; tools and agents that
consume storage are nexus-agents.
© ProfSynapse, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 10 other files (scripts, references) in .skills/nexus-storage of ProfSynapse/nexus.
- SKILL.md
- protocols/change-schema.md
- protocols/diagnose-storage.md
- protocols/persist-new-data.md
- protocols/self-refine.md
- references/failure-modes.md
- references/paths-and-layout.md
- references/schema-rules.md
- references/storage-model.md
- refinement-log.md
- scripts/check_schema_consistency.py
Open the folder on GitHubat commit f48a4ea
Compare with similar skills
Nexus Storage next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Nexus Storage this skillProfSynapse/nexus | 156 | — | ~749 | Automated safety check: Pass | MIT | |
| Database Scoutzebbern/claude-code-guide | 4.7k | — | ~1.1k | Automated safety check: Pass | MIT | |
| Frontmcp Setupagentfront/frontmcp | 146 | — | ~5.8k | Automated safety check: Pass | Apache-2.0 | |
| Blueprint Local Scaffoldreceptron/mulmoterminal | 236 | — | ~647 | Automated safety check: Pass | MIT | |
| Add Memory KindEverMind-AI/EverOS | 13k | — | ~2.6k | Automated safety check: Pass | Apache-2.0 | |
| SQL Database Support for pRESTprest/prest | 4.6k | — | ~1.6k | Automated safety check: Pass | MIT |
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More from ProfSynapse/nexus
All 12 skills in this repoNexus Agents
ProfSynapse/nexus
How to add, change and verify a Nexus agent or tool, and the contract every tool must satisfy.
Nexus Eval Harness
ProfSynapse/nexus
Work on the Nexus LLM eval harness in tests/eval/ — author or fix a scenario fixture, write an eval config, change the executors, assertions or reports, or explain a run that produced nothing…
Nexus Model Eval
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Grade how well a model drives the Nexus two-tool protocol (getTools/useTools) and decide whether a low score is the model's fault or the harness's.
Nexus Model Updates
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Add, change or verify a Nexus LLM model definition — the registry entry, the provider default, and proof the model id actually works against the live endpoint.
Nexus Release
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Cut a Nexus release — bump the version with the repo's own machinery, get the docs and generated sources right, push a tag the GitHub Actions workflow will actually pick up, and recover when it does…
Nexus Testing
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Verify a Nexus change — pick a Jest lane, write a test that can actually fail, run the in-app Obsidian CLI loop, drive the eval harness, or fix a shipped-docs drift failure.
Related
Works with
Categories
Questions about Nexus Storage
What does Nexus Storage do?
How to change, persist, migrate and recover Nexus data without losing it. Nexus Storage is an agent skill from ProfSynapse/nexus. How to change, persist, migrate and recover Nexus data without losing it.
When should I use Nexus Storage?
Nexus Storage fits situations like: adding a SQLite table; persisting anything that must survive a restart; A cache rebuild; resolving a vault.
How do I install Nexus Storage in Claude Code?
Run `npx skills add ProfSynapse/nexus --skill nexus-storage -a claude-code`. Or copy the skill folder (.skills/nexus-storage in ProfSynapse/nexus) into .claude/skills/nexus-storage in your project. Claude Code loads it when a task matches its description.
How do I install Nexus Storage in Codex?
Run `npx skills add ProfSynapse/nexus --skill nexus-storage -a codex`. Or copy the skill folder (.skills/nexus-storage in ProfSynapse/nexus) into .agents/skills/nexus-storage in your project. Codex loads it when a task matches its description.
Can I use Nexus Storage in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add ProfSynapse/nexus --skill nexus-storage -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/nexus-storage, .gemini/skills/nexus-storage, .github/skills/nexus-storage and .opencode/skills/nexus-storage in your project.
What does Nexus Storage need to run?
Going by SKILL.md and its folder, Nexus Storage needs Python for the scripts in its folder and the command-line tools its instructions call (python3). Our summary lists: Python 3.
Does Nexus Storage access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Nexus Storage safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.
What licence does Nexus Storage use?
Nexus Storage is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Nexus Storage use?
About 749 tokens (SKILL.md is roughly 3k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 8.1k tokens, read only when the agent opens those files.
What are the alternatives to Nexus Storage?
Skills that share tags, products or a category with Nexus Storage: Database Scout (zebbern/claude-code-guide, 4.7k stars), Frontmcp Setup (agentfront/frontmcp, 146 stars), Blueprint Local Scaffold (receptron/mulmoterminal, 236 stars) and Add Memory Kind (EverMind-AI/EverOS, 13k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Nexus Storage?
ProfSynapse (a GitHub user) maintains it in ProfSynapse/nexus, which has 156 GitHub stars. The repository holds 12 skills in this directory. The repository was last updated on October 8, 2026.
Source: ProfSynapse/nexus on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.