Public record
Software health reportschema 0.34.0 · metrics 2.10.0 · 2026-09-15 11:30 UTC

espressif / esptool-js

Javascript implementation of flasher tool for Espressif chips, running in web browser using WebSerial.

TypeScriptApache-2.0★ 532 stars⑂ 180 forkssince Jun 2021View on GitHub ↗
KindLibraryhow this is determined
#esp32#esptool#webserial

espressif/esptool-js holds a health index of 80 out of 100, placing it in the Excellent band. It scores highest on Sustainability & Governance (81/100) and lowest on Security (50/100). It was last updated 4 days ago. 2 contributors account for most of its recent work.

80
overall / 100
Excellent

Software health index

Metrics are grouped into weighted categories on one standardized 1–100 scale. Overall starts as their weighted mean, calibrated against the distribution of the public record so bands carry percentile meaning; when public evidence triggers the High-Risk Jurisdiction Policy, the rating is adjusted and receives an At Risk ceiling of 34.

80
Exceptional93-100The record's top tier (≈ top 5%); essentially all checked criteria met
Excellent80-92Strong across the board; minor gaps
Good65-79Healthy; gaps are limited and manageable
Moderate50-64Acceptable with notable gaps; review recommended
Weak35-49Material weaknesses across several areas
At Risk20-34Significant weaknesses; adoption warrants caution
Critical1-19Severe problems (abandoned, single-maintainer, no hygiene)
VitalityCommunity &AdoptionSustainability &GovernanceEngineeringQualitySecurityAI Readiness

Score profile

Each axis is a category. The shape matters more than the average — a healthy subject fills the whole shape, while a spike-and-crater profile means strength in one dimension is masking risk in another.

The weighted overall 68 is calibrated to 80 on the published index scale (record calibration 2026-08-02).

Ownership

Espressif SystemsOrganization · verified domain
8,765 followers341 public repossince Oct 2014

This repository is backed by an organization — shared, accountable stewardship that can outlive any single maintainer.

Package ecosystems

RegistryPackageVersionDownloads / moVersionsLast publish
npmesptool-js0.6.1127,9202540 days ago

Metrics by category

Vitality

Is the project alive — is code being written and are releases shipping?

73Good · 21% of overall

Development activity

66Good
How it's scored
36/36Push recency — last push 4 days ago
6.9/36Commit cadence — 10/52 weeks with commits
12.6/18Commit volume — 24 commits in the last year
10/10OpenSSF Scorecard: Maintained — 11 commit(s) and 4 issue activity found in the last 90 days -- score normalized to 10
Inputs used
commits_last_year24
human_commit_share1
days_since_last_push4
active_weeks_last_year10

Release discipline

83Excellent
How it's scored
27/27Ships releases — 22 releases published
36/36Release recency — latest release 40 days ago
19.8/27Release cadence — a release every ~73.9 days
0/10OpenSSF Scorecard: Signed-Releases — Project has not signed or included provenance with any releases.
Inputs used
releases_count22
latest_release_tagv0.6.1
releases_from_tagsno
days_since_latest_release40
mean_days_between_releases73.9

Community & Adoption

Does the project have users, downloads, attention, and a welcoming setup for contributors?

69Good · 17% of overall

Popularity & adoption

70Good
How it's scored
44.2/60Stars — 532 stars
18.8/25Forks — 180 forks
6.8/15Watchers — 18 watchers
Inputs used
forks180
stars532
watchers18
growth_stateunverified
growth_factor_pct100
growth_unverified_reasonno_history

Community health

57Moderate
How it's scored
22.5/22.5README
22.5/22.5License — recognized license (Apache-2.0)
0/18CONTRIBUTING guide
0/13.5Code of conduct
0/7.2Issue template
6.3/6.3PR template
Inputs used
has_readmeyes
has_licenseyes
readme_badges0
has_contributingno
has_issue_templateno
has_code_of_conductno
readme_badge_services—
has_pull_request_templateyes

Ecosystem adoption (downloads)

85Excellent
How it's scored
68.1/80Monthly downloads — 127,920 downloads/month across npm
0/20Registry dependents — not reported by this ecosystem
Inputs used
packagesesptool-js
dependents—
ecosystemsnpm
total_downloads—
monthly_downloads127,920
unverified_packages_excluded—
Excluded from scoring (no data or not applicable): Registry dependents. Remaining weights renormalized.

Sustainability & Governance

Will the project survive its people — bus factor, responsiveness, who backs it, and package upkeep?

81Excellent · 23% of overall

Maintainer resilience (bus factor)

63Moderate
How it's scored
25.2/54Bus factor — 2 contributor(s) cover half of all commits
14.6/22.5Commit distribution — top contributor authored 35% of commits
13.5/13.5Contributor breadth — 25 contributors
10/10OpenSSF Scorecard: Contributors — project has 8 contributing companies or organizations
Inputs used
bus_factor2
contributors_sampled25
top_contributor_share0.349

Issue & PR responsiveness

68Good
How it's scored
30.1/42Issue resolution — 72% of issues closed
26.6/30PR acceptance — 117/132 decided PRs merged
6.5/13Newcomer PR acceptance — 2/4 first-time contributors' PRs merged in 30d
4.5/15OpenSSF Scorecard: Code-Review — Found 9/29 approved changesets -- score normalized to 3
Inputs used
merged_prs117
open_issues33
closed_issues83
prs_merged_7d0
prs_decided_7d0
prs_merged_30d5
prs_decided_30d7
issue_closed_ratio0.716
closed_unmerged_prs15
first_time_authors_30d3
first_time_prs_merged_30d2
first_time_prs_decided_30d4

Ownership & stewardship

100Exceptional
How it's scored
30/30Ownership backing — organization-owned
20/20Verified domain
25/25Owner reach — 8,765 followers of espressif
25/25Track record — 341 public repos, account ~11 yr old
Inputs used
followers8,765
owner_typeOrganization
is_verifiedyes
owner_loginespressif
public_repos341
account_age_days4,338

Package maintenance

100Exceptional
How it's scored
25/25Published & resolvable — 1 package(s) on npm
35/35Publish recency — latest publish 40 days ago
20/20Version history — 25 published versions
20/20Not deprecated — active, not deprecated or yanked
Inputs used
packagesesptool-js
ecosystemsnpm
any_deprecatedno
min_days_since_publish40

Engineering Quality

Are baseline engineering and documentation practices in place?

64Moderate · 19% of overall

Engineering practices

56Moderate
How it's scored
24/24CI workflows — 7 workflow(s)
0/24Tests present
16/16Linter config — .eslintrc
0/9.6Pre-commit hooks
0/6.4.editorconfig
16/20OpenSSF Scorecard: CI-Tests — 20 out of 24 merged PRs checked by a CI test -- score normalized to 8
Inputs used
has_ciyes
has_testsno
has_editorconfigno
has_linter_configyes
has_precommit_configno

Documentation

75Good
How it's scored
30/30README
0/25Documentation directory
15/15Documentation / homepage site — https://espressif.github.io/esptool-js/
10/10Repository description
10/10Topics — 3 topics
10/10Wiki
Inputs used
topicsesp32, esptool, webserial
has_wikiyes
homepagehttps://espressif.github.io/esptool-js/
docs_sitehttps://espressif.github.io/esptool-js/
has_readmeyes
has_docs_dirno
has_descriptionyes

Security

Are visible security and supply-chain practices strong, without unresolved high-risk jurisdiction exposure?

50Moderate · 16% of overall

Security posture

38Weak
How it's scored
7.5/7.5Binary-Artifacts — no binaries found in the repo
0/7.5Branch-Protection — branch protection not enabled on development/release branches
2/2.5CI-Tests — 20 out of 24 merged PRs checked by a CI test -- score normalized to 8
0/2.5CII-Best-Practices — no effort to earn an OpenSSF best practices badge detected
2.2/7.5Code-Review — Found 9/29 approved changesets -- score normalized to 3
2.5/2.5Contributors — project has 8 contributing companies or organizations
10/10Dangerous-Workflow — no dangerous workflow patterns detected
0/7.5Dependency-Update-Tool — no update tool detected
0/5Fuzzing — project is not fuzzed
2.5/2.5License — license file detected
7.5/7.5Maintained — 11 commit(s) and 4 issue activity found in the last 90 days -- score normalized to 10
5/5Packaging — packaging workflow detected
0.5/5Pinned-Dependencies — dependency not pinned by hash detected -- score normalized to 1
0/5SAST — SAST tool is not run on all commits -- score normalized to 0
0/5Security-Policy — security policy file not detected
0/7.5Signed-Releases — Project has not signed or included provenance with any releases.
0/7.5Token-Permissions — detected GitHub workflow tokens with excessive permissions
0/7.5Vulnerabilities — 31 existing vulnerabilities detected
Inputs used
sourceopenssf_scorecard
checks_evaluated18
scorecard_versionv5.5.0
checks_inconclusive0
scorecard_aggregate3.8

Dependency advisories

100Exceptional
How it's scored
35/35Direct dependencies free of known advisories — no direct dependency carries a known advisory
25/25Indirect dependencies free of known advisories — no indirect dependency carries a known advisory
0/40No advisories left outstanding — no advisory carries a publication date
Inputs used
sourceosv
advisories0
affected_packages0
assessed_packages3
unassessed_packages0
affected_by_severitynone
direct_affected_packages0
Excluded from scoring (no data or not applicable): No advisories left outstanding. Remaining weights renormalized. Matched the npm:esptool-js@0.6.1 runtime dependency closure — what installing the published package pulls in — 3 packages. Reachability is not analyzed.

AI Readiness

How well is the repo equipped to be developed and maintained with AI coding agents? Carries a deliberately small weight (4%): agent tooling is a real maintenance signal, but a repository with none can still reach 100/100.

54Moderate · 4% of overall

Agent context & guidance

36Weak
How it's scored
0/45Agent instructions — no CLAUDE.md / AGENTS.md / editor rules
0/15Machine-readable docs (llms.txt)
36.3/40Legible commit history — 68 of 100 human commits state their intent (structured subject or explanatory body)
Inputs used
has_llms_txtno
llms_txt_url—
legible_history_share0.68
agent_instruction_files—
agent_instruction_max_bytes—

Verify loop (build / test / typecheck)

35Weak
How it's scored
0/18One-command bootstrap
0/22Automated tests
11/11Lint / format config — .eslintrc
11/11Static type checking — examples/typescript/tsconfig.json, tsconfig.json
10/10Reproducible environment — devcontainer, lockfile
2/10Demonstrated agent practice — 1 of the last 100 commits agent-authored or agent-credited
0/8Automated maintenance — no automated dependency updates observed
1/10OpenSSF Scorecard: Pinned-Dependencies — dependency not pinned by hash detected -- score normalized to 1
Inputs used
has_nixno
has_testsno
lockfilespackage-lock.json
has_dockerfileno
typed_languageyes
bootstrap_files—
has_devcontaineryes
has_linter_configyes
typecheck_configsexamples/typescript/tsconfig.json, tsconfig.json
agent_commit_share0.01
toolchain_manifests—
dependency_bot_commit_share0

Code legibility for models

98Exceptional
How it's scored
45/45Type-checkable code — TypeScript (statically typed)
53.5/55Manageable file sizes — 1/37 source files over 60KB
Inputs used
primary_languageTypeScript
largest_source_bytes71,908
source_files_sampled37
oversized_source_files1

Machine-readable interfaces

100Exceptional
How it's scored
0/40API schema (OpenAPI/GraphQL/proto) — not applicable to this kind of software
0/20MCP server — not applicable to this kind of software
40/40Runnable examples — examples
Inputs used
example_dirsexamples
has_mcp_signalno
api_schema_files—
interfaces_expected_of—
Excluded from scoring (no data or not applicable): API schema (OpenAPI/GraphQL/proto), MCP server. Remaining weights renormalized.

Key facts

532GitHub stars
25contributors
24commits, last 12 months
4days since last push
22releases
2bus factor
33open issues
npmpackage ecosystems

Data collection warnings

  • Star history unavailable: GitHub GraphQL error: Resource not accessible by personal access token

More detail

Star and fork history 0 ★ / 180 ⇿
0Stars
180Forks
22Releases

When each star and fork was added, collected from GitHub and bucketed by day. Cumulative growth sits directly above the daily additions it is made of, so the two read against each other: steady organic accretion looks nothing like an abrupt, short-lived burst. Where that difference is measurable, it is reported as growth authenticity.

0408012016020016132021-062024-012026-08
Major 0Minor 4Patch 18

Each point covers 5 days.

OpenSSF Scorecard 3.8 / 10
3.8aggregate

Independent, tool-agnostic security assessment from the open-source OpenSSF Scorecard. Each check rewards a security practice, not a specific vendor's tool. Checks Scorecard could not determine are marked n/a and excluded from the security score (never counted as zero).Scorecard v5.5.0 · 2026-09-15 11:29 UTC

10Binary-Artifactsno binaries found in the repo
0Branch-Protectionbranch protection not enabled on development/release branches
8CI-Tests20 out of 24 merged PRs checked by a CI test -- score normalized to 8
0CII-Best-Practicesno effort to earn an OpenSSF best practices badge detected
3Code-ReviewFound 9/29 approved changesets -- score normalized to 3
10Contributorsproject has 8 contributing companies or organizations
10Dangerous-Workflowno dangerous workflow patterns detected
0Dependency-Update-Toolno update tool detected
0Fuzzingproject is not fuzzed
10Licenselicense file detected
10Maintained11 commit(s) and 4 issue activity found in the last 90 days -- score normalized to 10
10Packagingpackaging workflow detected
1Pinned-Dependenciesdependency not pinned by hash detected -- score normalized to 1
0SASTSAST tool is not run on all commits -- score normalized to 0
0Security-Policysecurity policy file not detected
0Signed-ReleasesProject has not signed or included provenance with any releases.
0Token-Permissionsdetected GitHub workflow tokens with excessive permissions
0Vulnerabilities31 existing vulnerabilities detected
Direct dependencies 3
RegistryPackageVersion constraintManifest
npmatob-lite^2.0.0package.json
npmpako^2.1.0package.json
npmtslib^2.4.1package.json
All dependencies 302

Full resolved dependency set from the GitHub dependency graph: 4 direct and 298 indirect (transitive) packages. The transitive closure is complete when the repository commits a lockfile.

RegistryPackageVersionRelation
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npmschema-utils4.0.0indirect
npmschema-utils4.3.0indirect
npmsemver6.3.1indirect
npmsemver7.5.4indirect
npmserialize-javascript6.0.2indirect
npmshebang-command2.0.0indirect
npmshebang-regex3.0.0indirect
npmshiki0.14.4indirect
npmshx^0.3.4indirect
npmslash3.0.0indirect
npmsource-map0.6.1indirect
npmsource-map-support0.5.21indirect
npmsourcemap-codec1.4.8indirect
npmspdx-exceptions2.3.0indirect
npmspdx-expression-parse3.0.1indirect
npmspdx-license-ids3.0.13indirect
npmstrip-ansi6.0.1indirect
npmstrip-json-comments3.1.1indirect
npmsupports-color7.2.0indirect
npmsupports-color8.1.1indirect
npmsupports-preserve-symlinks-flag1.0.0indirect
npmtapable2.2.1indirect
npmterser5.37.0indirect
npmterser-webpack-plugin5.3.11indirect
npmtext-table0.2.0indirect
npmto-regex-range5.0.1indirect
npmtsutils3.21.0indirect
npmtype-check0.4.0indirect
npmtype-fest0.20.2indirect
npmtypedoc0.25.2indirect
npmtypescript4.8.4indirect
npmtypescript^4.9.4indirect
npmundici-types6.20.0indirect
npmupdate-browserslist-db1.1.2indirect
npmuri-js4.4.1indirect
npmvscode-oniguruma1.7.0indirect
npmvscode-textmate8.0.0indirect
npmwatchpack2.4.2indirect
npmweb-serial-polyfill^1.0.15indirect
npmwebpack5.97.1indirect
npmwebpack-sources3.2.3indirect
npmwhich2.0.2indirect
npmword-wrap1.2.5indirect
npmwrappy1.0.2indirect
npmyallist4.0.0indirect
npmyocto-queue0.1.0indirect
Dependency advisories 0

Installing npm:esptool-js@0.6.1 pulls in 3 packages, direct and transitive: 0 carry known advisories, of which 0 are direct dependencies.

No known advisories affect the assessed dependencies.

An advisory means the version recorded in the dependency graph falls inside an advisory’s affected range. Reachability is not analysed, and the graph includes development and test pins — a finding may concern tooling rather than shipped software.

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Scores are signals, not warranties. They reflect publicly visible practices on GitHub — not a code audit, and not a security guarantee.

Missing data is excluded and weights renormalized, never scored as zero. Methodology is versioned and open: metrics v2.10.0, schema v0.34.0 — full methodology · metrics wiki.

How one result sits in the wider record: aggregate statistics — npm.