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dev-mem

Runtime memory access and manipulation on embedded Linux via /dev/mem, /dev/kmem, and MTD devices. Covers physical memory reads/writes, kernel symbol resolution via /proc/kallsyms, live firmware patching with mtd_debug and flashcp, and bypassing memory-access restrictions (CONFIG_STRICT_DEVMEM, kernel.perf_event_paranoid).

65

Quality

80%

Does it follow best practices?

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SecuritybySnyk

Critical

Do not install without reviewing

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tessl review fix ./packages/decepticon/decepticon/skills/standard/iot/dev-mem/SKILL.md
SKILL.md
Quality
Evals
Security

Quality

Content

85%Weight 40%Scale 1-5

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

The body is a highly actionable, well-sequenced operational guide with strong validation on destructive workflows, but it suffers from a dangling reference to a non-existent bundle file and keeps a large amount of detail inline rather than splitting it out.

Suggestions

Create references/devmem-kernel-exploit.md (or remove the dangling reference) so the cited 'Kernel exploitation via /dev/mem' link resolves.

Move the large U-Boot env modification script (Phase 3d) and the MTD write checklist into a references file, leaving a concise inline summary and a one-level-deep pointer.

DimensionReasoningScore

Conciseness

Mostly lean code-first content with terse, justified comments and no padding explaining concepts Claude already knows; only minor instances of over-explanation (e.g., 'most common embedded tool', 'preferred — handles bad blocks on NAND') could be trimmed.

4 / 5

Actionability

Fully executable, copy-paste-ready bash commands and a complete Python U-Boot env patcher cover the common cases across every phase (devmem2, dd, mtd_debug read/write/erase, flashcp, /proc/<pid>/mem, kallsyms).

5 / 5

Workflow Clarity

Phases are clearly sequenced and the destructive MTD write workflow (Phase 3c) is a 5-step checklist with explicit validation — backup, sha256, erase, write, then 'diff ... && echo WRITE OK || echo MISMATCH' as a feedback loop.

5 / 5

Progressive Disclosure

Section structure is reasonable (Prerequisites, Phases 1–5, Evidence, OPSEC, References), but the only bundle reference — 'references/devmem-kernel-exploit.md' — does not exist (no references/ directory), so navigation is broken and substantial detail remains inline.

3 / 5

Total

17

/

20

Passed

Description

75%Weight 40%Scale 1-5

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

The description is specific, distinctive, and rich in natural trigger terms for its niche, but it lacks an explicit 'Use when...' trigger clause, leaving the 'when' only weakly implied and capping completeness at 3.

Suggestions

Add an explicit 'Use when...' clause naming natural trigger phrases (e.g., 'Use when patching embedded Linux firmware via /dev/mem or MTD, resolving kernel symbols via /proc/kallsyms, or bypassing CONFIG_STRICT_DEVMEM').

Include the common tool names devmem2 and busybox devmem as trigger synonyms to round out keyword coverage.

DimensionReasoningScore

Specificity

Names the domain and multiple concrete actions: 'physical memory reads/writes', 'kernel symbol resolution via /proc/kallsyms', 'live firmware patching with mtd_debug and flashcp', and 'bypassing memory-access restrictions (CONFIG_STRICT_DEVMEM, kernel.perf_event_paranoid)' — comprehensive coverage of specific actions.

5 / 5

Completeness

The 'what' is clearly and concretely answered, but there is no 'Use when...' clause or equivalent explicit trigger guidance in the description, which caps completeness at 3 per the judging guidelines.

3 / 5

Trigger Term Quality

Strong keyword coverage of device paths and tools users in this niche would actually say (/dev/mem, /dev/kmem, MTD, /proc/kallsyms, mtd_debug, flashcp), but omits a few natural synonyms like devmem2 and busybox devmem.

4 / 5

Distinctiveness Conflict Risk

A clear niche (embedded Linux runtime memory/flash patching) with distinct, specialized triggers and minimal overlap risk with other skills.

5 / 5

Total

17

/

20

Passed

Validation

87%

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation14 / 16 Passed

Validation for skill structure

CriteriaDescriptionResult

metadata_version

'metadata.version' is missing

Warning

referenced_paths_exist

Referenced path issues: 1 missing

Warning

Total

14

/

16

Passed

Repository
PurpleAILAB/Decepticon
Reviewed

Table of Contents

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