opencode-export

A tool for exporting OpenCode coding-agent sessions as self-contained HTML pages and JSON files. OpenCode sessions are records of conversations and tool activity during software work.

In plain words
What is it for?
Listing sessions, previewing session details, and exporting development histories with metadata, messages, tool activity, and source-code highlighting.
Why use it?
It creates portable records that can be shared, reviewed offline, or kept as backups while preserving the full session content.

Skill for Claude CodeCodex

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 skills/zelinzhou-thu/opencode-export/skill
Any agent
npx skills add ZelinZhou-THU/opencode-export --skill skill
Clone the repo
git clone --depth 1 https://github.com/ZelinZhou-THU/opencode-export

Made for: Claude Code, Codex.

Per session 41 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 651 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 $0.00041 $0.00651
Opus 5 $0.00020 $0.00326
Sonnet 5 $0.00008 $0.00130
Haiku 4.5 $0.00004 $0.00065

Measured yesterday against content hash 6072875e6d45, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

opencode-export 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 yesterday.

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.

skill/SKILL.md · 67 lines

How it starts

The opening of the file, as written. The whole thing — 67 lines — stays where its author put it; the contents beside it link to each section on GitHub.

What I do

Export opencode session history to portable HTML + JSON archives:

  • list_sessions — discover what sessions exist (by project, time, size)
  • show_session — preview a session's metadata + recent messages
  • export_sessions — generate self-contained HTML (with offline vendor assets) + structured JSON

Output HTML includes: sticky header with session metadata, collapsible tool/reasoning blocks, subagent inlining, lazy syntax highlighting, TOC drawer of user prompts. JSON preserves full content for programmatic analysis.

When to use me

  • User asks to "save / archive / export / back up" their sessions
  • User needs to share AI interaction history (e.g., for TA review, portfolio, audit)
  • User wants to generate a browsable record of a project's development
  • User asks "what sessions do I have" or "show me my session history"

How to use me

Step 1 — Discover what's available:

Call list_sessions with the project directory (omit to auto-detect from CWD). Returns recent root sessions with id/title/date/message_count/tokens.

Step 2 — Preview if user is unsure:

Call show_session with a specific session_id to peek at metadata + recent messages without committing to a full export.

Step 3 — Export when user confirms:

Call export_sessions with:

  • output_dir (required) — where to write files
  • session_ids (optional) — specific sessions, or omit for auto-select by config rules
  • formats (optional) — ["html","json"] (default) or ["html"] only

Returns a summary with file paths. Tell the user where to find index.html to open in a browser.

Example workflow

User: "导出我最近的项目会话给 TA 看"

  1. list_sessions(project_directory="my-project") → see what exists
  2. Tell user: "找到 N 个会话,最近的是 [title] 于 [date],要导出哪些?"
  3. User confirms → export_sessions(output_dir="...", session_ids=[...])
  4. Report: "已导出 X 个会话到 [path],打开 index.html 即可浏览"

Notes

  • Tokens for older sessions are backfilled from step-finish parts; values may be approximate.
  • Secret redaction is automatic (API keys, tokens, passwords masked).
  • Vendor assets (highlight.js, mermaid, katex) are bundled for offline viewing.
  • For programmatic analysis, prefer data/sessions.json over HTML parsing.
  • Large exports (>20 sessions) may take 30+ seconds; the tool blocks until complete.

Read the full file on GitHub · 67 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. yesterday First seen · 67 lines · 41 tokens per session scan A 6072875e6d45

Subscribe to this mod's changes

opencode-export is a skill published in the GitHub repository ZelinZhou-THU/opencode-export (1 stars, last pushed 2mo ago), licensed MIT. It adds 41 tokens to every session and 651 once invoked, about $0.0002 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 2026-08-31.

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