Susumu Takahashi

Founder of Layerworks (solo). Years of maintaining client WordPress sites across Japanese hosts, now building tools for it. I post war stories from real WP maintenance.

Japan Joined on May 31, 2026 https://en.wpmm.jp/

Work

Solo developer & founder at Layerworks

Susumu Takahashi

Jul 7

A "days since last maintenance" badge — color-coding staleness across many sites

#wordpress #php #tutorial

4 min read

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Susumu Takahashi

Jul 6

Detecting the running site from streaming logs — why log-order inference broke, and how one marker fixed it

#python #webdev #programming

4 min read

Susumu Takahashi

Jul 4

Quieting PHP 8.2+ deprecated noise from older WP-CLI — three layers to keep JSON parse clean

#wordpress #php #tutorial

5 min read

Susumu Takahashi

Jul 3

Implementing a dynamic OGP image generator for our blog — PHP GD, per-post 1200 630 cards

#python #webdev #programming

5 min read

Susumu Takahashi

Jul 3

Diff from the live server, not from your git history — when a local repo has drifted from production

#python #webdev #programming

4 min read

Susumu Takahashi

Jul 1

Multilingual emails from a Stripe webhook — inferring language from currency

#python #webdev #programming

4 min read

Susumu Takahashi

Jul 1

Maintaining WordPress sites behind HTTP Basic auth — Playwright, urllib, and encrypted credentials

#wordpress #php #tutorial

4 min read

Susumu Takahashi

Jun 30

When paramiko's defaults silently get your IP banned — the look_for_keys and allow_agent trap

#wordpress #php #tutorial

4 min read

Susumu Takahashi

Jun 29

Sweeping i18n leaks with four parallel AI agents — from 300 candidates down to 60 real bugs

#python #webdev #programming

4 min read

Susumu Takahashi

Jun 28

When SSH commands hit a csh login shell — wrapping every command in /bin/sh -c across the codebase

#wordpress #php #tutorial

4 min read

Susumu Takahashi

Jun 27

Building a cache-first dashboard — explicit fetch and a "closes-but-keeps-running" notice

#python #webdev #programming

4 min read

Susumu Takahashi

Jun 26

Connection architectures for WordPress maintenance tools — mapping four products on a two-axis grid

#wordpress #php #tutorial

5 min read

Susumu Takahashi

Jun 24

Hub-and-spoke SEO for comparison pages — fielding "alternative" search intent from multiple angles

#python #webdev #programming

3 min read

Susumu Takahashi

Jun 24

Playwright versus WordPress's "admin email confirmation" screen — how automation can clear the 6-month gate

#wordpress #php #tutorial

3 min read

Susumu Takahashi

Jun 23

When WP admin shows a plugin update but WP-CLI doesn't — making automation see proprietary updaters

#wordpress #php #tutorial

3 min read

Susumu Takahashi

Jun 21

Solving "Permissions are too open" from inside the app — auto-diagnosing and auto-fixing SSH key permissions

#wordpress #php #tutorial

3 min read

Susumu Takahashi

Jun 20

"not a valid OPENSSH private key file" — building a compat layer for seven SSH private-key formats

#wordpress #php #tutorial

3 min read

Susumu Takahashi

Jun 18

Renaming a site without losing its data — separating display name from a stable identifier

#wordpress #php #tutorial

3 min read

Susumu Takahashi

Jun 18

Beyond "Update All" — selecting plugins across sites while keeping every safety mechanism on

#wordpress #php #tutorial

3 min read

Susumu Takahashi

Jun 17

Distributing a Python desktop app on Windows and Mac — the full release pipeline

#python #webdev #programming

4 min read

Susumu Takahashi

Jun 16

Why we built a desktop app on local Flask + browser UI instead of PyQt or Electron

#python #webdev #programming

3 min read

Susumu Takahashi

Jun 14

Pinpoint rollback — building per-plugin revert with WP-CLI

#wordpress #php #tutorial

3 min read

Susumu Takahashi

Jun 13

Three gaps the WordPress maintenance industry still hasn't solved — from a survey of four major tools

#wordpress #php #tutorial

3 min read

Susumu Takahashi

Jun 12

After a core rollback, halt the rest — a safety design we arrived at the hard way

#wordpress #php #tutorial

3 min read

Susumu Takahashi

Jun 11

InfiniteWP's Strengths and Who It Fits — An Honest Review from a Competing Tool Builder

#wordpress #php #tutorial

4 min read

Susumu Takahashi

Jun 9

WP Umbrella's Strengths and Who It Fits — An Honest Review from a Competing Tool Builder

#wordpress #php #tutorial

4 min read

Susumu Takahashi

Jun 8

MainWP's Strengths and Who It Fits — An Honest Review from a Competing Tool Builder

#wordpress #php #tutorial

4 min read

Susumu Takahashi

Jun 6

'Command not found' — and what's really blocking WP-CLI

#wordpress #php #tutorial

3 min read

Susumu Takahashi

Jun 3

Why WP-CLI Won't Start on Some Shared Hosts — A Field Investigation Across Four Architectures

#wordpress #php #tutorial

5 min read

Susumu Takahashi

Jun 1

ManageWP's Strengths and Who It Fits — An Honest Review from a Competing Tool Builder

#wordpress #php #tutorial

4 min read

Susumu Takahashi

May 31

When WP-CLI fatals on the plugin you came to rescue

#wordpress #php #tutorial

2 min read

DEV Community

Susumu Takahashi

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A "days since last maintenance" badge — color-coding staleness across many sites

Want to connect with Susumu Takahashi?

Detecting the running site from streaming logs — why log-order inference broke, and how one marker fixed it

Quieting PHP 8.2+ deprecated noise from older WP-CLI — three layers to keep JSON parse clean

Implementing a dynamic OGP image generator for our blog — PHP GD, per-post 1200 630 cards

Diff from the live server, not from your git history — when a local repo has drifted from production

Multilingual emails from a Stripe webhook — inferring language from currency

Maintaining WordPress sites behind HTTP Basic auth — Playwright, urllib, and encrypted credentials

When paramiko's defaults silently get your IP banned — the look_for_keys and allow_agent trap

Sweeping i18n leaks with four parallel AI agents — from 300 candidates down to 60 real bugs

When SSH commands hit a csh login shell — wrapping every command in /bin/sh -c across the codebase

Building a cache-first dashboard — explicit fetch and a "closes-but-keeps-running" notice

Connection architectures for WordPress maintenance tools — mapping four products on a two-axis grid

Hub-and-spoke SEO for comparison pages — fielding "alternative" search intent from multiple angles

Playwright versus WordPress's "admin email confirmation" screen — how automation can clear the 6-month gate

When WP admin shows a plugin update but WP-CLI doesn't — making automation see proprietary updaters

Solving "Permissions are too open" from inside the app — auto-diagnosing and auto-fixing SSH key permissions

"not a valid OPENSSH private key file" — building a compat layer for seven SSH private-key formats

Renaming a site without losing its data — separating display name from a stable identifier

Beyond "Update All" — selecting plugins across sites while keeping every safety mechanism on

Distributing a Python desktop app on Windows and Mac — the full release pipeline

Why we built a desktop app on local Flask + browser UI instead of PyQt or Electron

Pinpoint rollback — building per-plugin revert with WP-CLI

Three gaps the WordPress maintenance industry still hasn't solved — from a survey of four major tools

After a core rollback, halt the rest — a safety design we arrived at the hard way

InfiniteWP's Strengths and Who It Fits — An Honest Review from a Competing Tool Builder

WP Umbrella's Strengths and Who It Fits — An Honest Review from a Competing Tool Builder

MainWP's Strengths and Who It Fits — An Honest Review from a Competing Tool Builder

'Command not found' — and what's really blocking WP-CLI

Why WP-CLI Won't Start on Some Shared Hosts — A Field Investigation Across Four Architectures

ManageWP's Strengths and Who It Fits — An Honest Review from a Competing Tool Builder

When WP-CLI fatals on the plugin you came to rescue