Fedit

Go-based MCP server for surgical file editing: anchored insert, delete, replace, move, copy.

Quick Install

Automated & IDE Setup

Copy the AI prompt to install this server into Claude Code, Cursor, or another agent — or use 1-click editor setup below.

One-click editor setup isn’t available for this listing yet — we don’t have a confirmed install command, and we’d rather show nothing than point your editor at the wrong package or host. Follow the project’s own setup instructions, linked above.

Manual Client & Custom JSON ConfigExpand JSON ▾

No confirmed setup config for this listing yet. We only publish a config block when the install details come from the project itself — its README, its docs, or a verified owner. We haven’t found those for fedit, and we’d rather show nothing than a guess you’d paste into your client. Follow the project’s own setup instructions for the current steps.

Documentation Overview

fedit — Fast File Editor for the Terminal

A zero-dependency CLI tool for surgical file edits from the command line. No interactive editors. No sed/awk gymnastics. Just simple, predictable operations with built-in verification.

Built for sysadmins, DevOps engineers, and anyone who scripts config changes.

fedit demo

Code

go install github.com/amalexico/fedit@latest

Why fedit?

One binary, zero dependencies — pure Go, runs everywhere
17 language mappers — see the structure of any file before editing
-v flag — verify every mutation before moving on
Line-aware — no regex surprises, no "which match did it hit?"
Stream engine — process multi-GB files line-by-line with atomic integrity
Field extraction — pull CSV/TSV column N without awk
Safe — no in-place unless you say so, never touches files you did not name

Install

Go install (recommended):

bash

go install github.com/amalexico/fedit@latest

Or download the binary from GitHub Releases and put it in your PATH.

Verify:

bash

fedit -file /etc/hostname -op show

Quick Start

nginx.conf

# See what is in a file
fedit -file config.yaml -op show

# See just lines 10-25
fedit -file config.yaml -op show -line 10 -end 25

# Find every line containing "timeout"
fedit -file config.yaml -op find -match "timeout"

# See the structure of a Go file
fedit -file main.go -op map -lang go

# Replace line 42 with new content
fedit -file config.yaml -op replace -line 42 -end 42 -text "timeout: 60s" -v

# Insert a line after every occurrence of "server {"
fedit -file nginx.conf -op insertafter -match "server {" -text "    include security.conf;" -v

# Move a function block before another (content-matched, atomic)
fedit -file main.go -op move -match "func OldHelper(" -end 45 -beforematch "func NewHelper(" -v

# Copy a config block and paste it 3 times at a new location
fedit -file values.yaml -op copy -line 50 -end 65 -after 200 -times 3 -v

# Extract column 2 from a TSV file (v1.4+)
fedit -file data.tsv -op fields -col 2

# Write content with literal backslashes — no \n escape expansion (v1.6.0)
fedit -file config.txt -op writeraw -text "path=C:\\Users\\admin"

# Hex-encode tricky text to sidestep shell quoting (v1.6.0)
# fwencode produces the hex; fedit decodes it before writing
fedit -file config.txt -op write -texthex 706174683d2f746d70

# Overwrite a file cleanly then insert new content (v1.6.0)
fedit -file config.txt -op insert -line 0 -cleanfirst -text "# regenerated"

# Get bare line numbers for scripting (v1.6.0)
fedit -file main.go -op find -match "TODO" -x 2>$null

# Regex replace on a multi-GB log without loading it into memory (v1.4+)
fedit -file huge.log -op replaceall -match 'ERROR' -text 'WARN' -stream

All Operations

show — Display file contents

bash

# Entire file
fedit -file app.conf -op show

# Lines 50-75 only
fedit -file app.conf -op show -line 50 -end 75
# Last 10 lines
fedit -file app.conf -op show -line -10:

# Lines 50 to 5th from end
fedit -file app.conf -op show -line 50 -end -5

# Lines 100-103 (relative range)
fedit -file app.conf -op show -line 100:+3

# Show from one anchor to another (no line numbers needed)
fedit -file config.go -op show -match "func Start" -endmatch "func End"

find — Search for lines matching a substring

bash

# Find all lines containing "ERROR"
fedit -file /var/log/app.log -op find -match "ERROR"

# Output includes context lines and occurrence numbers
# Use -nth to target a specific match in other operations

Pro tip: Run find first to get line numbers, then use replace or delete with exact lines.

insert — Insert content after a line number

bash

# Insert a comment after line 1
fedit -file script.sh -op insert -line 1 -text "# Added by deploy script" -v

# Insert multiple lines from a file
fedit -file config.yaml -op insert -line 10 -textfile extra-config.yaml -v

insertafter — Insert after a matching line (RECOMMENDED)

nginx.conf

# Add a firewall rule after the matching comment
fedit -file iptables.rules -op insertafter -match "# Custom rules" -text "-A INPUT -p tcp --dport 8080 -j ACCEPT" -v

# Target the 2nd occurrence
fedit -file nginx.conf -op insertafter -match "server {" -nth 2 -text "    listen 8443 ssl;" -v

# Target the last occurrence
fedit -file docker-compose.yml -op insertafter -match "volumes:" -nth -1 -text "      - /data:/data" -v

insertbefore — Insert before a matching line (RECOMMENDED)

bash

# Add a header before the first route definition
fedit -file routes.rb -op insertbefore -match "get '/'" -text "  # === Public Routes ===" -v

# Insert a dependency before the closing bracket
fedit -file package.json -op insertbefore -match "}" -nth -1 -textfile new-deps.txt -v

replace — Replace a line range with new content

bash

# Replace a single line
fedit -file config.ini -op replace -line 15 -end 15 -text "max_connections = 200" -v

# Replace lines 30-35 with content from a patch file
fedit -file server.conf -op replace -line 30 -end 35 -textfile patched-block.txt -v
# Replace a section by content anchors (no line numbers needed)
fedit -file CHANGELOG.md -op replace -match "## v1.6" -endmatch "## v1.5" -textfile new-section.txt -v

replaceall — Global find-and-replace

bash

# Change all occurrences of old domain to new
fedit -file nginx.conf -op replaceall -match "old.example.com" -text "new.example.com" -v

# Update a version string everywhere
fedit -file Makefile -op replaceall -match "1.1.0" -text "1.2.0" -v

---


### fields -- Extract a column from delimited files (v1.4.0)

```bash
# Extract column 2 from a tab-separated file (default delimiter: tab)
fedit -file data.tsv -op fields -col 2

# Extract the third field from a CSV
fedit -file report.csv -op fields -col 3 -delim ","

# Extract usernames from /etc/passwd (colon-delimited)
fedit -file /etc/passwd -op fields -col 1 -delim ":"

Output goes to stdout for piping. Lines shorter than -col are skipped silently. Always streaming -- no memory limit regardless of file size.

-stream -- Large-file streaming mode (v1.4.0)

Add -stream to replaceall or find to process files line-by-line without loading them into memory. 10 MB per-line buffer handles JSON blobs and minified files. Atomic integrity: writes to a temp file then renames -- original is untouched on interruption.

bash

# Replace a pattern in a multi-GB log file
fedit -file server.log -op replaceall -match "10.0.0.1" -text "10.0.0.2" -stream

# Regex replace in a huge file with capture groups
fedit -file big.csv -op replaceall -match-regex 'id_(\d+)' -text 'ID_$1' -stream

# Streaming find -- grep-style output to stdout
fedit -file huge.log -op find -match "FATAL" -stream

Supported with -stream: replaceall (literal and regex), find. Not supported: move, copy, map (these require full file structure in memory).

writeraw — Write without escape expansion

bash

# Write a Windows path without double-escaping backslashes
fedit -file config.ini -op writeraw -text "basedir=C:\\Program Files\\App"

# Write content from a file as-is
fedit -file output.txt -op writeraw -textfile template.txt

Unlike write, writeraw treats \n as two characters (backslash + n), not a newline.

writelines — Write lines interactively from stdin

bash

fedit -file notes.txt -op writelines
# Type lines at the > prompt, Ctrl+Z (Windows) or Ctrl+D (Unix) to finish

-texthex — Hex-encoded input (v1.6.0)

Encode text to hex first (e.g. with fwencode), then pass the hex string as -text. Eliminates all shell-quoting issues with special characters.

bash

# Decode hex string and write — no quoting gymnastics needed
fedit -file deploy.sh -op write -texthex 23212f62696e2f62617368

-matchhex / -endmatchhex — Hex-encoded anchors (v1.8.1)

Same idea as -texthex, but for the search anchors. PowerShell mangles a double quote inside -match before fedit sees it, so case "replace": silently becomes case replace: and matches nothing. Pass the anchor as hex instead; fedit decodes it into -match (or -endmatch) once, so every op that takes an anchor works unchanged.

bash

# Find a line containing double quotes (hex of: case "replace":)
fedit -file main.go -op find -matchhex 6361736520227265706c616365223a

Invalid hex exits 1 with matchhex: invalid hex string: ... (or endmatchhex: ...).

Multiple files -- comma list or glob (v1.8.1)

-file accepts a comma-separated list, a glob, or both, for the read-only ops show, find and map. Each file gets a ==> path <== header, and a real file with that exact name wins over glob expansion.

bash

# Find TODO in every Go file in the current folder
fedit -file '*.go' -op find -match 'TODO'

# Map two files at once
fedit -file main.go,mcp.go -op map -lang go

find skips files with no hits (grep-style) and exits 1 only if nothing matched in any file.
map skips unrecognized extensions with a SKIP line.
A summary line reports how many files had results.
Mutating ops and -stream are rejected with exit 1 before any file is read. For a global rename across files, use -files GLOB with replaceall.
CLI only: the MCP tools still take a single file.

-cleanfirst — Truncate before writing (v1.6.0)

bash

# Clear the file then insert fresh content at line 0
fedit -file output.txt -op insert -line 0 -cleanfirst -text "# regenerated"

-x — Machine-readable output (v1.6.0)

Code

Read the full README →View source on GitHub →

Related MCP Servers

View all in Developer Tools View all alternatives

Reviews

No reviews yet — be the first to share how this listing worked for you.

Frequently Asked Questions about Fedit

We don't have a confirmed install command for fedit yet, so we don't publish a generated one — a guessed package name would point at the wrong package or none at all. Follow the project's own README or setup instructions (https://github.com/amalexico/fedit) for the current steps.

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Technical Specs & Signals

CategoryDeveloper Tools

27Quality signal: Emerging · 27/100How this signal is calculated ▾

Server availabilityNot measured

Not scored for repo-hosted servers — we can't reach the running server, only its GitHub page. Hosted MCP endpoints are health-checked live.

Verified ownership8/20

Documentation & tools11/30

Adoption & activity1/15

Community engagement0/10

A guidance signal from public completeness & health data — not a user rating. New listings start lower and rise as they add docs, get verified, and grow adoption. Signals we can't observe for a listing are skipped, not counted against it.

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More in 💻 Developer Tools →Best MCP servers for Developers →Alternatives to Fedit →Install in Claude Desktop Install in Cursor Install in VS Code Setup guides for all 13 MCP clients

Fedit

Go-based MCP server for surgical file editing: anchored insert, delete, replace, move, copy.

Quick Install

Automated & IDE Setup

Copy the AI prompt to install this server into Claude Code, Cursor, or another agent — or use 1-click editor setup below.

Manual Client & Custom JSON ConfigExpand JSON ▾

Documentation Overview

fedit — Fast File Editor for the Terminal

A zero-dependency CLI tool for surgical file edits from the command line. No interactive editors. No sed/awk gymnastics. Just simple, predictable operations with built-in verification.

Built for sysadmins, DevOps engineers, and anyone who scripts config changes.

fedit demo

Code

go install github.com/amalexico/fedit@latest

Why fedit?

One binary, zero dependencies — pure Go, runs everywhere
17 language mappers — see the structure of any file before editing
-v flag — verify every mutation before moving on
Line-aware — no regex surprises, no "which match did it hit?"
Stream engine — process multi-GB files line-by-line with atomic integrity
Field extraction — pull CSV/TSV column N without awk
Safe — no in-place unless you say so, never touches files you did not name

Install

Go install (recommended):

bash

go install github.com/amalexico/fedit@latest

Or download the binary from GitHub Releases and put it in your PATH.

Verify:

bash

fedit -file /etc/hostname -op show

Quick Start

nginx.conf

# See what is in a file
fedit -file config.yaml -op show

# See just lines 10-25
fedit -file config.yaml -op show -line 10 -end 25

# Find every line containing "timeout"
fedit -file config.yaml -op find -match "timeout"

# See the structure of a Go file
fedit -file main.go -op map -lang go

# Replace line 42 with new content
fedit -file config.yaml -op replace -line 42 -end 42 -text "timeout: 60s" -v

# Insert a line after every occurrence of "server {"
fedit -file nginx.conf -op insertafter -match "server {" -text "    include security.conf;" -v

# Move a function block before another (content-matched, atomic)
fedit -file main.go -op move -match "func OldHelper(" -end 45 -beforematch "func NewHelper(" -v

# Copy a config block and paste it 3 times at a new location
fedit -file values.yaml -op copy -line 50 -end 65 -after 200 -times 3 -v

# Extract column 2 from a TSV file (v1.4+)
fedit -file data.tsv -op fields -col 2

# Write content with literal backslashes — no \n escape expansion (v1.6.0)
fedit -file config.txt -op writeraw -text "path=C:\\Users\\admin"

# Hex-encode tricky text to sidestep shell quoting (v1.6.0)
# fwencode produces the hex; fedit decodes it before writing
fedit -file config.txt -op write -texthex 706174683d2f746d70

# Overwrite a file cleanly then insert new content (v1.6.0)
fedit -file config.txt -op insert -line 0 -cleanfirst -text "# regenerated"

# Get bare line numbers for scripting (v1.6.0)
fedit -file main.go -op find -match "TODO" -x 2>$null

# Regex replace on a multi-GB log without loading it into memory (v1.4+)
fedit -file huge.log -op replaceall -match 'ERROR' -text 'WARN' -stream

All Operations

show — Display file contents

bash

# Entire file
fedit -file app.conf -op show

# Lines 50-75 only
fedit -file app.conf -op show -line 50 -end 75
# Last 10 lines
fedit -file app.conf -op show -line -10:

# Lines 50 to 5th from end
fedit -file app.conf -op show -line 50 -end -5

# Lines 100-103 (relative range)
fedit -file app.conf -op show -line 100:+3

# Show from one anchor to another (no line numbers needed)
fedit -file config.go -op show -match "func Start" -endmatch "func End"

find — Search for lines matching a substring

bash

# Find all lines containing "ERROR"
fedit -file /var/log/app.log -op find -match "ERROR"

# Output includes context lines and occurrence numbers
# Use -nth to target a specific match in other operations

Pro tip: Run find first to get line numbers, then use replace or delete with exact lines.

insert — Insert content after a line number

bash

# Insert a comment after line 1
fedit -file script.sh -op insert -line 1 -text "# Added by deploy script" -v

# Insert multiple lines from a file
fedit -file config.yaml -op insert -line 10 -textfile extra-config.yaml -v

insertafter — Insert after a matching line (RECOMMENDED)

nginx.conf

# Add a firewall rule after the matching comment
fedit -file iptables.rules -op insertafter -match "# Custom rules" -text "-A INPUT -p tcp --dport 8080 -j ACCEPT" -v

# Target the 2nd occurrence
fedit -file nginx.conf -op insertafter -match "server {" -nth 2 -text "    listen 8443 ssl;" -v

# Target the last occurrence
fedit -file docker-compose.yml -op insertafter -match "volumes:" -nth -1 -text "      - /data:/data" -v

insertbefore — Insert before a matching line (RECOMMENDED)

bash

# Add a header before the first route definition
fedit -file routes.rb -op insertbefore -match "get '/'" -text "  # === Public Routes ===" -v

# Insert a dependency before the closing bracket
fedit -file package.json -op insertbefore -match "}" -nth -1 -textfile new-deps.txt -v

replace — Replace a line range with new content

bash

# Replace a single line
fedit -file config.ini -op replace -line 15 -end 15 -text "max_connections = 200" -v

# Replace lines 30-35 with content from a patch file
fedit -file server.conf -op replace -line 30 -end 35 -textfile patched-block.txt -v
# Replace a section by content anchors (no line numbers needed)
fedit -file CHANGELOG.md -op replace -match "## v1.6" -endmatch "## v1.5" -textfile new-section.txt -v

replaceall — Global find-and-replace

bash

# Change all occurrences of old domain to new
fedit -file nginx.conf -op replaceall -match "old.example.com" -text "new.example.com" -v

# Update a version string everywhere
fedit -file Makefile -op replaceall -match "1.1.0" -text "1.2.0" -v

---


### fields -- Extract a column from delimited files (v1.4.0)

```bash
# Extract column 2 from a tab-separated file (default delimiter: tab)
fedit -file data.tsv -op fields -col 2

# Extract the third field from a CSV
fedit -file report.csv -op fields -col 3 -delim ","

# Extract usernames from /etc/passwd (colon-delimited)
fedit -file /etc/passwd -op fields -col 1 -delim ":"

Output goes to stdout for piping. Lines shorter than -col are skipped silently. Always streaming -- no memory limit regardless of file size.

-stream -- Large-file streaming mode (v1.4.0)

bash

# Replace a pattern in a multi-GB log file
fedit -file server.log -op replaceall -match "10.0.0.1" -text "10.0.0.2" -stream

# Regex replace in a huge file with capture groups
fedit -file big.csv -op replaceall -match-regex 'id_(\d+)' -text 'ID_$1' -stream

# Streaming find -- grep-style output to stdout
fedit -file huge.log -op find -match "FATAL" -stream

Supported with -stream: replaceall (literal and regex), find. Not supported: move, copy, map (these require full file structure in memory).

writeraw — Write without escape expansion

bash

# Write a Windows path without double-escaping backslashes
fedit -file config.ini -op writeraw -text "basedir=C:\\Program Files\\App"

# Write content from a file as-is
fedit -file output.txt -op writeraw -textfile template.txt

Unlike write, writeraw treats \n as two characters (backslash + n), not a newline.

writelines — Write lines interactively from stdin

bash

fedit -file notes.txt -op writelines
# Type lines at the > prompt, Ctrl+Z (Windows) or Ctrl+D (Unix) to finish

-texthex — Hex-encoded input (v1.6.0)

Encode text to hex first (e.g. with fwencode), then pass the hex string as -text. Eliminates all shell-quoting issues with special characters.

bash

# Decode hex string and write — no quoting gymnastics needed
fedit -file deploy.sh -op write -texthex 23212f62696e2f62617368

-matchhex / -endmatchhex — Hex-encoded anchors (v1.8.1)

bash

# Find a line containing double quotes (hex of: case "replace":)
fedit -file main.go -op find -matchhex 6361736520227265706c616365223a

Invalid hex exits 1 with matchhex: invalid hex string: ... (or endmatchhex: ...).

Multiple files -- comma list or glob (v1.8.1)

bash

# Find TODO in every Go file in the current folder
fedit -file '*.go' -op find -match 'TODO'

# Map two files at once
fedit -file main.go,mcp.go -op map -lang go

find skips files with no hits (grep-style) and exits 1 only if nothing matched in any file.
map skips unrecognized extensions with a SKIP line.
A summary line reports how many files had results.
Mutating ops and -stream are rejected with exit 1 before any file is read. For a global rename across files, use -files GLOB with replaceall.
CLI only: the MCP tools still take a single file.

-cleanfirst — Truncate before writing (v1.6.0)

bash

# Clear the file then insert fresh content at line 0
fedit -file output.txt -op insert -line 0 -cleanfirst -text "# regenerated"

-x — Machine-readable output (v1.6.0)

Code

Read the full README →View source on GitHub →

Related MCP Servers

View all in Developer Tools View all alternatives

Reviews

No reviews yet — be the first to share how this listing worked for you.

Frequently Asked Questions about Fedit

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Technical Specs & Signals

CategoryDeveloper Tools

27Quality signal: Emerging · 27/100How this signal is calculated ▾

Server availabilityNot measured

Not scored for repo-hosted servers — we can't reach the running server, only its GitHub page. Hosted MCP endpoints are health-checked live.

Verified ownership8/20

Documentation & tools11/30

Adoption & activity1/15

Community engagement0/10

★ Spotlight Slot

Feature Your MCP Server

Get maximum visibility for your server across our directory, search results, and detail pages.

Spotlight Your Server

Own this project?

Free dofollow backlink: add your website and place the AllMCPs badge on it — no claim needed. We detect it automatically and keep it verified as long as the badge stays live.

Claim & get free dofollow

Share & Embed

Add our SVG badge (dark/light directory styles) or embeddable widget to your site.

Explore more

More in 💻 Developer Tools →Best MCP servers for Developers →Alternatives to Fedit →Install in Claude Desktop Install in Cursor Install in VS Code Setup guides for all 13 MCP clients