Agent skill

Heaptrack

by mohitmishra786 in mohitmishra786/low-level-dev-skills

heaptrack memory profiler skill for Linux. An agent skill from mohitmishra786/low-level-dev-skills.

MITAuto-check: notesDevelopment

Install Heaptrack

skills CLI

$ npx skills add mohitmishra786/low-level-dev-skills --skill heaptrack -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install mohitmishra786/low-level-dev-skills heaptrack --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/mohitmishra786/low-level-dev-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/profilers/heaptrack .claude/skills/heaptrack && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "heaptrack" agent skill from https://github.com/mohitmishra786/low-level-dev-skills/tree/main/skills/profilers/heaptrack into .claude/skills/heaptrack/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "heaptrack", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/mohitmishra786/low-level-dev-skills/tree/main/skills/profilers/heaptrack

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add mohitmishra786/low-level-dev-skills --skill heaptrack -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install mohitmishra786/low-level-dev-skills heaptrack --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/mohitmishra786/low-level-dev-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/profilers/heaptrack .agents/skills/heaptrack && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "heaptrack" agent skill from https://github.com/mohitmishra786/low-level-dev-skills/tree/main/skills/profilers/heaptrack into .agents/skills/heaptrack/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "heaptrack", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add mohitmishra786/low-level-dev-skills --skill heaptrack -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install mohitmishra786/low-level-dev-skills heaptrack --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/mohitmishra786/low-level-dev-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/profilers/heaptrack .cursor/skills/heaptrack && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "heaptrack" agent skill from https://github.com/mohitmishra786/low-level-dev-skills/tree/main/skills/profilers/heaptrack into .cursor/skills/heaptrack/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "heaptrack", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/mohitmishra786/low-level-dev-skills.git --path skills/profilers/heaptrack

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add mohitmishra786/low-level-dev-skills --skill heaptrack -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install mohitmishra786/low-level-dev-skills heaptrack --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/mohitmishra786/low-level-dev-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/profilers/heaptrack .gemini/skills/heaptrack && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "heaptrack" agent skill from https://github.com/mohitmishra786/low-level-dev-skills/tree/main/skills/profilers/heaptrack into .gemini/skills/heaptrack/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "heaptrack", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install mohitmishra786/low-level-dev-skills heaptrack

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add mohitmishra786/low-level-dev-skills --skill heaptrack -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/mohitmishra786/low-level-dev-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/profilers/heaptrack .github/skills/heaptrack && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "heaptrack" agent skill from https://github.com/mohitmishra786/low-level-dev-skills/tree/main/skills/profilers/heaptrack into .github/skills/heaptrack/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "heaptrack", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add mohitmishra786/low-level-dev-skills --skill heaptrack -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install mohitmishra786/low-level-dev-skills heaptrack --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/mohitmishra786/low-level-dev-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/profilers/heaptrack .opencode/skills/heaptrack && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "heaptrack" agent skill from https://github.com/mohitmishra786/low-level-dev-skills/tree/main/skills/profilers/heaptrack into .opencode/skills/heaptrack/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "heaptrack", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: heaptrack
GitHub stars: 253
Token cost: ~1.3k tokens
SKILL.md length: 270 words
Files: 2 (incl. references)
Skills in repo: 138
Repo updated: Jun 27, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

heaptrack memory profiler skill for Linux. An agent skill from mohitmishra786/low-level-dev-skills.

Works in 8 steps: Installation → Basic usage → Build for better profiling → …
Tracking heap allocations
SKILL.md covers Purpose, Triggers, Workflow and Related skills
Calls cmake, cargo and apt-get; reaches github.com

What it does

Heaptrack is an agent skill from mohitmishra786/low-level-dev-skills. heaptrack memory profiler skill for Linux. Use when tracking heap allocations, finding memory leaks, measuring peak heap usage, identifying allocation hotspots, or comparing allocation behaviour between runs. Activates on queries about heaptrack, heap profiling, memory allocation analysis, heaptrackprint, allocation hotspots, or memory leak detection with heaptrack.

Its SKILL.md is about 1.3k tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including reference files (for example `references/heaptrack-analysis.md`).

It sits in Development, covering Performance optimization. It works with Linux and Rust. The repository describes itself as: A curated suite of AI agent skills for systems and low-level programming with C/C++, Rust, and Zig toolchains, covering compilers, debuggers, profilers, build systems…. The licence is MIT.

When your agent uses it

Tracking heap allocations
Finding memory leaks
Measuring peak heap usage
Identifying allocation hotspots

Example prompts

“/heaptrack”

Workflow steps

8 steps, taken from the step headings in SKILL.md.

Installation
Basic usage
Build for better profiling
Interpreting heaptrack_print output
Filtering and analysis options
Comparing two runs
heaptrack vs Valgrind massif
Integration with Rust

What it can do on your machine

Read from SKILL.md and the folder at commit bdc5847. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
- cmake
- cargo
- apt-get
- dnf
- git
From the folder's file list and the shell code blocks in SKILL.md.
Network
Hosts in commands or code, which the agent is likely to contact:
- github.com
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Heaptrack loads about 1.3k tokens when it runs, and up to ~2.5k if it reads all its reference files. Until then it costs about 95 tokens; SKILL.md has 270 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~95
When it runs · the whole SKILL.md, loaded when a task matches: ~1.3k
With references · SKILL.md plus every file in references/, read only if the agent opens them: ~2.5k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check: notes

The automated check noted patterns worth knowing about, such as sudo or a known installer.

NoteRuns commands with sudoSKILL.md:27

sudo apt-get install heaptrack heaptrack-gui

NoteRuns commands with sudoSKILL.md:30
```
sudo dnf install heaptrack
```
NoteRuns commands with sudoSKILL.md:33
```
sudo pacman -S heaptrack
```

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from mohitmishra786/low-level-dev-skills at commit bdc5847, republished under its MIT licence (© mohitmishra786). 270 words, ~1,307 tokens.

Download SKILL.mdSave it as .claude/skills/heaptrack/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.

name: heaptrack
description: heaptrack memory profiler skill for Linux. Use when tracking heap allocations, finding memory leaks, measuring peak heap usage, identifying allocation hotspots, or comparing allocation behaviour between runs. Activates on queries about heaptrack, heap profiling, memory allocation analysis, heaptrack_print, allocation hotspots, or memory leak detection with heaptrack.

heaptrack

Purpose

Guide agents through heaptrack for heap allocation profiling on Linux: recording allocation traces, analysing with heaptrack_print, identifying leaks and hotspots, and comparing runs.

Triggers

"How do I find memory allocation hotspots in my C++ program?"
"My program uses too much memory — how do I find where?"
"How do I use heaptrack to detect memory leaks?"
"What is heaptrack and how does it differ from Valgrind massif?"
"How do I compare memory usage between two program versions?"
"heaptrack_print output — how do I interpret it?"

Workflow

1. Installation

bash

# Ubuntu/Debian
sudo apt-get install heaptrack heaptrack-gui

# Fedora
sudo dnf install heaptrack

# Arch
sudo pacman -S heaptrack

# Build from source
git clone https://github.com/KDE/heaptrack.git
cmake -S heaptrack -B heaptrack-build -DCMAKE_BUILD_TYPE=Release
cmake --build heaptrack-build -j$(nproc)

2. Basic usage

bash

# Profile a program (generates heaptrack.<prog>.<pid>.zst)
heaptrack ./myapp arg1 arg2

# Attach to running process
heaptrack --pid 12345

# Analyse the trace file
heaptrack_print heaptrack.myapp.12345.zst

# GUI analysis (if heaptrack-gui installed)
heaptrack_gui heaptrack.myapp.12345.zst

3. Build for better profiling

bash

# Build with debug symbols (essential for readable backtraces)
cmake -S . -B build -DCMAKE_BUILD_TYPE=RelWithDebInfo
cmake --build build

# Then profile
heaptrack ./build/myapp

4. Interpreting heaptrack_print output

bash

heaptrack_print heaptrack.myapp.*.zst 2>/dev/null

Key sections:

text

total runtime: 2.34s
calls to allocation functions: 145,234 (62,064/s)
temporary allocations: 89,123 (38,087/s)
peak heap memory consumption: 45.23MB
peak RSS (including heap): 78.45MB
total memory leaked: 2.34MB

# Top allocation hotspots (by peak memory)
hotspot 1: 12.34MB peak
  myapp::cache::Cache::insert(...)
    at src/cache.cpp:142
  ...

# Top leaked allocations
leak 1: 2.34MB leaked in 1,234 allocations
  myapp::connection::Connection::new(...)
    at src/connection.cpp:67

Metric	Meaning
`total memory leaked`	Memory allocated but never freed
`peak heap consumption`	Maximum live heap at any point
`temporary allocations`	Allocated and freed within one call stack
`calls to allocation functions`	Total malloc/new/realloc calls

5. Filtering and analysis options

bash

# Show top N hotspots
heaptrack_print -p 10 heaptrack.myapp.*.zst  # top 10 hotspots

# Show flamegraph data
heaptrack_print -f heaptrack.myapp.*.zst > alloc.folded
flamegraph.pl alloc.folded > alloc.svg

# Show only leaked allocations
heaptrack_print -l heaptrack.myapp.*.zst

# Show allocations above threshold
heaptrack_print --min-cost 1048576 heaptrack.myapp.*.zst  # >1MB only

# Short summary
heaptrack_print -s heaptrack.myapp.*.zst

6. Comparing two runs

bash

# Record baseline
heaptrack ./myapp --config baseline.conf
mv heaptrack.myapp.*.zst before.zst

# Make changes, record again
heaptrack ./myapp --config new.conf
mv heaptrack.myapp.*.zst after.zst

# Compare (shows diff of hotspots)
heaptrack_print before.zst | head -20 > before.txt
heaptrack_print after.zst  | head -20 > after.txt
diff before.txt after.txt

7. heaptrack vs Valgrind massif

Feature	heaptrack	Valgrind massif
Overhead	~2-3x	~20x
Output	Compressed trace + GUI	Text/ms_print
Leak detection	Yes	Yes
Peak tracking	Yes	Yes
Temporal view	Yes (GUI)	Yes (ms_print)
Platform	Linux only	Linux, macOS
Needs recompile	No	No
Call graph	Full stack traces	Full stack traces

Use heaptrack for most cases; use massif when you need platform portability or detailed snapshot comparison.

8. Integration with Rust

heaptrack works with Rust binaries when using the system allocator:

rust

// Rust: use system allocator so heaptrack can intercept
use std::alloc::System;
#[global_allocator]
static A: System = System;

bash

# Profile Rust binary
cargo build --release
heaptrack ./target/release/myapp

# Note: debug symbols improve backtraces
cargo build --profile release-with-debug
heaptrack ./target/release-with-debug/myapp

For heaptrack_print output reference and GUI usage, see references/heaptrack-analysis.md.

Use skills/profilers/valgrind for Memcheck (correctness) and massif (alternative heap profiler)
Use skills/profilers/linux-perf for CPU profiling alongside memory profiling
Use skills/rust/rust-profiling for Rust-specific allocation profiling approaches
Use skills/runtimes/sanitizers — ASan LeakSanitizer for leak detection without profiling overhead

Files

SKILL.md and 1 other file (references) in skills/profilers/heaptrack of mohitmishra786/low-level-dev-skills.

SKILL.md
references/heaptrack-analysis.md

Open the folder on GitHubat commit bdc5847

Compare with similar skills

Heaptrack next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Heaptrack compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Heaptrack this skillmohitmishra786/low-level-dev-skills	253	—	~1.3k	Automated safety check: Notes	MIT	3 mo ago
PlotJuggler 4 Perf ProfilingPlotJuggler/PlotJuggler	6.2k	—	~1.6k	Automated safety check: Notes	MPL-2.0	8 days ago
The Art of Debuggingstas00/the-art-of-debugging	1.7k	—	~6.1k	Automated safety check: Notes	CC-BY-SA-4.0	3 days ago
Samplyvortex-data/vortex	3.2k	—	~2.7k	Automated safety check: Pass	Apache-2.0	today
OpenLogi Device DiagnosisAprilNEA/OpenLogi	23k	—	~1.6k	Automated safety check: Pass	Apache-2.0	today
Investigate User Bugcristicretu/diri	427	—	~1.2k	Automated safety check: Pass	Apache-2.0	today

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6.2k GitHub stars~1.6k tokensUpdated 8 days ago
DevelopmentAuto-check: notes
The Art of Debugging
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Questions about Heaptrack

What does Heaptrack do?

heaptrack memory profiler skill for Linux. An agent skill from mohitmishra786/low-level-dev-skills. Heaptrack is an agent skill from mohitmishra786/low-level-dev-skills. heaptrack memory profiler skill for Linux.

When should I use Heaptrack?

Heaptrack fits situations like: tracking heap allocations; finding memory leaks; measuring peak heap usage; identifying allocation hotspots.

How do I install Heaptrack in Claude Code?

Run `npx skills add mohitmishra786/low-level-dev-skills --skill heaptrack -a claude-code`. Or copy the skill folder (skills/profilers/heaptrack in mohitmishra786/low-level-dev-skills) into .claude/skills/heaptrack in your project. Claude Code loads it when a task matches its description.

How do I install Heaptrack in Codex?

Run `npx skills add mohitmishra786/low-level-dev-skills --skill heaptrack -a codex`. Or copy the skill folder (skills/profilers/heaptrack in mohitmishra786/low-level-dev-skills) into .agents/skills/heaptrack in your project. Codex loads it when a task matches its description.

Can I use Heaptrack in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add mohitmishra786/low-level-dev-skills --skill heaptrack -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/heaptrack, .gemini/skills/heaptrack, .github/skills/heaptrack and .opencode/skills/heaptrack in your project.

What does Heaptrack need to run?

Going by SKILL.md and its folder, Heaptrack needs the command-line tools its instructions call (cmake, cargo, apt-get, dnf and git).

Does Heaptrack access the network?

SKILL.md names 1 domain. In commands or code: github.com; the agent is likely to contact it when it follows the instructions. This is read from the text; nothing was executed.

Is Heaptrack safe to install?

Our automated static check of SKILL.md found notes only (runs commands with sudo), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.

What licence does Heaptrack use?

Heaptrack is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Heaptrack use?

About 1.3k tokens (SKILL.md is roughly 5.2k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 1.1k tokens, read only when the agent opens those files.

What are the alternatives to Heaptrack?

Skills that share tags, products or a category with Heaptrack: PlotJuggler 4 Perf Profiling (PlotJuggler/PlotJuggler, 6.2k stars), The Art of Debugging (stas00/the-art-of-debugging, 1.7k stars), Samply (vortex-data/vortex, 3.2k stars) and OpenLogi Device Diagnosis (AprilNEA/OpenLogi, 23k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Heaptrack?

mohitmishra786 (a GitHub user) maintains it in mohitmishra786/low-level-dev-skills, which has 253 GitHub stars. The repository holds 138 skills in this directory. The repository was last updated on June 27, 2026.

Source: mohitmishra786/low-level-dev-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Heaptrack

Facts

At a glance

What it does

When your agent uses it

Example prompts

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

heaptrack

Purpose

Triggers

Workflow

1. Installation

2. Basic usage

3. Build for better profiling

4. Interpreting heaptrack_print output

5. Filtering and analysis options

6. Comparing two runs

7. heaptrack vs Valgrind massif

8. Integration with Rust

Related skills

Files

Compare with similar skills

Similar skills

More from mohitmishra786/low-level-dev-skills

Related

Questions about Heaptrack