repo-to-blog-series

name: repo-to-blog-series description: Turn an open-source GitHub repo into a multi-article CSDN-style technical blog series with cinematic Gemini covers and ≤200-char abstracts. Use when the user provides a GitHub URL and asks to "analyze this codebase and write N articles in the same format as my existing series", especially when they want to mirror an existing series style (e.g. OpenClaw → MemPalace), parallelize the writing across subagents, generate matching cover images via gemini.google.com, and end with a short abstract per article. Trigger phrases: "基于这个仓库写系列博客", "参考xxx系列写后续几篇", "分析代码库 + 写文章 + 生成封面 + 总结摘要".

Repo → Blog Series Skill

End-to-end workflow that turns one GitHub repo into a deep technical blog series with covers and abstracts. Validated end-to-end on 2026-04-09 (mempalace v3.0.14 → 4 articles + 4 covers + 4 abstracts in ~25 min).

When to invoke

The user gives you:

• a GitHub repo URL
• "参考某系列的格式，写不少于 N 篇深度文章" (or equivalent)
• optionally: cover image generation, abstract generation, save-to-memory, push-to-github

Core principles

1. Parallelize the writing. N articles = N background Agent subagents fired simultaneously. Each one is self-contained — it cannot see the main conversation.
2. Each subagent gets a non-overlapping file slice of the repo. Listing what they MUST NOT cover is more important than listing what they should.
3. Mirror an existing series format by reading the user's reference articles first (browser → CSDN → extract title/TOC/code-block style/cover image).
4. Don't dump article bodies back into the main context. Subagents return only {path, char_count, one-line summary}.
5. Use the user's installed memory system (MemPalace) to persist learnings between runs.

Stage 1 — Setup & research

# Create task list
TaskCreate for: research, N articles, covers, abstracts, (memory save), (github push)

# Browse the reference series the user wants to mirror
mcp__claude-in-chrome__navigate → CSDN article URL
# Extract the cover image style
javascript_tool: get first <article> img src; screenshot it; analyze (dark / glow / 16:9 etc.)

# Clone target repo
cd /tmp && git clone --depth 1 <repo_url> repo_src
cd repo_src/<package_dir>
wc -l *.py | sort -rn   # rank files by size — biggest = deepest module

Read README + small entry files (__init__.py, config.py, __main__.py) to build a mental model.

Stage 2 — Plan article division

Carve N articles by module semantics, not line count. Typical patterns:

• Article 1: architecture / philosophy / data model
• Article 2: ingestion / mining / parsing
• Article 3: indexing / retrieval / knowledge representation
• Article 4: serving / CLI / hooks / practical guide (acts as series finale)

Each article ≥ 8000 Chinese characters. List which source files belong to which article — and which files are off-limits to which agent.

Stage 3 — Parallel writing (the critical step)

Fire N Agent({subagent_type: "general-purpose", run_in_background: true}) calls in parallel. Each prompt MUST contain:

1. Series context: name, position, what the previous N-1 articles already covered
2. Reference style description: title format, section numbering (一/1.1/1.1.1), emoji headers, ASCII boxed diagrams, real code blocks with language tags + file refs, comparison tables, "Why" rationale paragraphs, "下篇预告" + 参考文献 sections
3. The exact source files this agent owns (absolute paths under /tmp/repo_src/...)
4. The ranges this agent MUST NOT touch (so the 4 agents don't all rewrite the same content)
5. Output path (e.g. /home/jianxiong/doc/<series>-NN-<topic>.md)
6. Length floor: ≥ 8000 zh chars, depth-first
7. Reporting rule: "回报路径 + 字数 + 一句话总结，不要把正文贴回来" — saves main-thread context

While the agents run (5–10 min), do other work (e.g. cover generation).

Stage 4 — Cover generation via Gemini browser automation

Generation is automated; download is manual — see "user-gesture trust" note below. Plan: read reference style, fire all N prompts in one batch, watch the download folder, ask the user to click the N download buttons in conversation order.

Step 4.0 — Read the reference cover style (when mirroring an existing series)

// On the reference CSDN article page
Array.from(document.querySelectorAll('article img'))
  .filter(i => i.naturalWidth > 400)
  .map(i => ({src: i.src, w: i.naturalWidth, h: i.naturalHeight}))

Then navigate to the image URL and screenshot to see it.

Step 4.1 — Fire all N prompts in one chat

1. navigate to https://gemini.google.com/app (fresh load — the 发起新对话 button often does not actually swap chat URL on this build, so a hard navigate is more reliable)
2. For each of the N prompts, run a JS block that:
   • finds the editor (.ql-editor[contenteditable="true"])
   • clears it (use DOM removeChild loop — innerHTML = '' fails with TrustedHTML CSP)
   • appends a <p> with the prompt text
   • dispatches input event so Gemini's submit button becomes enabled
   • on a 600ms timeout, finds the button with aria-label containing 发送 and .click()s it
3. Between prompts, Bash run_in_background sleep 35. Do not await sleep inline (the runtime blocks long sleeps in foreground); a background sleep gives you a clean completion notification.
4. After all N sends, run a JS check that there are now N img elements with naturalWidth > 400 and N button[data-test-id="download-generated-image-button"]. If the count is short, re-send only the missing prompts.

Why one chat: it is enough — each prompt is explicit and overrides chat-context bias. Trying to start a new chat per cover wastes turns and the new-chat button is unreliable.

Step 4.2 — Why downloads must be manual

The first programmatic download click DOES work; subsequent ones DO NOT.

After the first successful download in a tab, Chromium revokes its "user gesture" trust for subsequent same-tab downloads triggered by element.click(), dispatchEvent, or even mcp__claude-in-chrome__computer left_click at the button's coordinates. None of these registers as a fresh user-initiated download. There is no JS workaround we have found that survives this restriction (see "DO NOT work" list below).

So: do not try to programmatically click N download buttons. Instead:

1. Set up the watcher (Step 4.3) before asking the user.
2. Ask the user, in plain language, to scroll the Gemini conversation from top to bottom and click each image's "下载完整尺寸的图片" hover button in order.
3. The watcher renames files by arrival order — so as long as the user clicks them top-to-bottom, the filenames line up with article numbers.

This is a deliberate tradeoff documented after a multi-attempt verification on 2026-04-29: faster, more reliable, less brittle than fighting Chromium's download trust.

Step 4.3 — Watcher script (renames files by arrival order)

Write this script to disk and start it via the Monitor tool before asking the user to click. It pre-records files already in ~/下载/ so it only acts on new ones.

#!/bin/bash
# /tmp/cover_watcher.sh
DEST=/home/jianxiong/<output-dir>/covers     # or wherever the series lives
SRC=/home/jianxiong/下载
declare -A SEEN
i=0
for f in $SRC/Gemini_Generated_Image_*.png; do [ -f "$f" ] && SEEN["$f"]=1; done
echo "watching $SRC for new Gemini files..."
while [ $i -lt N_COVERS ]; do
  for f in "$SRC"/Gemini_Generated_Image_*.png; do
    [ -f "$f" ] || continue
    if [ -z "${SEEN[$f]:-}" ]; then
      i=$((i+1))
      idx=$(printf "%02d" $i)
      target="$DEST/<series>-cover-$idx.png"      # match this series' file-naming convention
      mv "$f" "$target"
      echo "[$i/N] $f -> $target"
      SEEN["$f"]=1
    fi
  done
  sleep 1
done
echo "all N covers received"

Start with Monitor({command: "/tmp/cover_watcher.sh", persistent: false, timeout_ms: 600000}). Each rename emits one stdout line → one Claude-side notification. You'll know exactly when each cover lands.

Cover prompt template (battle-tested)

Generate a 16:9 cinematic premium tech-magazine cover. Style: hyper-detailed
cyberpunk concept art like a Marvel/Blade Runner movie poster — deep black
background, dramatic god-rays of light, volumetric fog, depth of field,
octane render quality, 8K detail.
Color palette: electric blue and cyan dominant, BUT punctuated with WARM
AMBER/ORANGE embers, hot magenta accents, and golden glints — NOT monochrome.
Subject: "<topic-specific scene with 2–3 concrete visual elements>".
No text, no letters, no logos, no watermark.
Ultra detailed, dark cinematic, depth of field, 16:9 aspect ratio.

Critical: writing only "blue cyan palette" yields monochrome / dull covers. Always force NOT monochrome and explicit warm accent colors.

For repo-based series, anchor each cover on 2–3 concrete visual elements that map to that article's module: ingestion → grain silos / streams; indexing → nested archive shelves; serving → glowing API gateway towers; CLI / hooks → control panels with switches; etc. Stay concrete — abstract nouns yield generic art.

Step 4.4 — Save the prompts to disk

Always emit <output-dir>/<series>-cover-prompts.md next to the articles, recording:

• Exact prompt text used for each cover
• The visual anchors / motifs each one corresponds to
• The reusable "style preamble" + "no-text trailer" so the user can re-roll any cover by hand

Treat this file with the same seriousness as the abstracts file — it is part of the deliverable, not throwaway scaffolding. It lets the user regenerate any cover later without going back to chat history.

Things that DO NOT work (don't waste time on them)

• ❌ fetch(blob://gemini...) from JS tool — content-script context, can't read page-context blobs
• ❌ POST base64 to http://127.0.0.1:8765 — HTTPS Gemini blocks mixed content
• ❌ xclip clipboard transfer — likely not installed and apt is often broken
• ❌ JS-triggered <a download> from a canvas blob — Chrome blocks programmatic downloads after the first user-gesture
• ❌ Synthetic MouseEvent/PointerEvent dispatch on the download button — same trust issue
• ❌ mcp__claude-in-chrome__computer left_click at the button's coords — also fails on the 2nd+ download in the same tab
• ✅ The reliable path is the user clicking the in-page "下载完整尺寸" button by hand, with a watcher script renaming files by arrival order

Step 4.5 — High-resolution screenshot fallback (if user can't click)

If the user is unavailable to click downloads, you can still capture each image at 1024×572 by:

1. Cloning the target <img> to a fresh fixed-position element at left:0,top:0 with width/height set to its naturalWidth/naturalHeight
2. Adding a black overlay underneath (position: fixed; z-index: 99998) to hide other UI
3. mcp__claude-in-chrome__computer zoom with region [0,0,naturalWidth,naturalHeight] and save_to_disk: true
4. The saved PNG is exactly 1024×572 — the actual Gemini output, just routed through the screenshot tool

Quality is identical to the in-page download. Use this when the human-in-the-loop is not possible.

Stage 5 — Abstracts (≤ N chars each)

Write one combined <series>-NN-MM-abstracts.md with one ## XX · title block per article. Validate length precisely:

import re
t = open('abstracts.md').read()
parts = re.split(r'^## ', t, flags=re.M)[1:]
for i, p in enumerate(parts):
    body = re.sub(r'\s', '', p.split('\n', 1)[1].strip())
    print(f'{i}: {len(body)}')

Note: "200 汉字" practically means "200 non-whitespace characters total" including English filenames. Initial drafts almost always overflow — budget 2–3 compression rounds.

Stage 6 — Persist & sync (optional)

• Save the workflow learnings to MemPalace (mempalace_add_drawer) so the next run benefits from the gotchas you discovered
• If the user has a skills repo on GitHub, push ~/.claude/skills/repo-to-blog-series/ there

File-naming convention

/home/jianxiong/doc/
├── <series>-NN-<short-topic>.md
├── <series>-cover-NN.png
└── <series>-NN-MM-abstracts.md

Typical end-to-end time

~25 minutes for 4 articles + 4 covers + 4 abstracts (parallel writers ~10min, serial covers ~10min, abstracts ~5min).

Series-finale rule

The last article in the series should include:

• A "系列总结" recapping all N articles
• A global comparison table vs the reference series (e.g. MemPalace vs OpenClaw across all 8 dimensions)
• A "未来展望" / roadmap section

Quality checklist before delivering

• All N articles ≥ length floor
• All articles use the same numbering / emoji / structural style
• No two articles cover the same source file in depth
• All cover images are 1376×768 (or at least 16:9)
• All cover images have warm accent colors, not monochrome
• All abstracts ≤ user's specified char limit (verified with python)
• Series-finale article has 系列总结 + global comparison + roadmap