Sephir

For developers

Sephir for developers.

A real multi-turn agent in every tab you have open — reading the docs page, the StackOverflow thread, and your local file viewer all at once. BYOK or sign in with ChatGPT Plus, no proxy in between.

What you actually use

Four features you’ll touch every day.

Multi-tab agent loop

Open three docs tabs, ask one question. extractPageText runs across all of them, the agent synthesises, the audit timeline shows every tool call.

BYO subscription

Sign in with ChatGPT Plus → Codex routes over your subscription, $0 in tokens. Or paste your Anthropic / OpenAI / OpenRouter / Ollama key — Sephir never proxies the prompt.

Saved skills

Snapshot a tool-use trace and replay it with /skill-name. /pr-review, /test-gen, /repro-bug — your team's playbook, scriptable.

Exportable audit

Every conversation exports to Markdown or JSON. Drop into your team's PR notes, knowledge base, or post-mortem template.

A typical day

Five steps, one prompt.

  1. 01Pin the three docs / API references the question depends on.
  2. 02Open the Sephir sidepanel and ask one question against all three.
  3. 03Watch the tool-call timeline: extractPageText(tab 1) → tab 2 → tab 3.
  4. 04Receive a structured answer with citations back to the source tabs.
  5. 05Save the trace as a skill and replay it next sprint with /that-skill.

Recommended setup

ChatGPT Plus via Codex OAuth for everyday work. Anthropic Claude Sonnet on a BYOK key for long-context reviews. OpenRouter for cheap experimentation.

See pricing

Try the agent layer free.

BYOK from day one, ChatGPT Plus OAuth in one click, no credit card required for the 7-day trial of Pro.

Install SephirSee the landing