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Fission-AI/OpenSpec

Spec-driven development (SDD) for AI coding assistants.

TypeScript★ 69,435+296 that day#7 on trending

Analyzed September 19, 2026 at bae58cf (main) with jscpd 5.4.0 in 3.4s.

C62.1/100

Project health130,037 lines of code (L)

Duplication53

7.9% in typescript, javascript, bash, tsx, perl

Dead code99

0.1%

Complexity46

56.3%

The score is jscpd's own --health model: markup, data and text left out, tests kept. The numbers below are the trending scan's.

2.54%duplicated code · 1,153 of 45,433 lines

80clones in code

207code files of 1,360 scanned

9.02%duplicated over all files · 1,394 clones

Most complex files

test/core/archive.test.ts514 cx
src/core/archive.ts389 cx
test/core/update.test.ts304 cx
src/core/init.ts278 cx
test/core/init.test.ts254 cx
src/core/specs-apply.ts243 cx
src/core/update.ts236 cx
src/commands/schema.ts234 cx
test/core/command-generation/adapters.test.ts201 cx
src/core/version-check.ts199 cx

Dead code 0.11% unused · 15 findings

website/cloudflare/router/worker.jsunused-file
website/app/sitemap.tsunused-file
website/app/robots.tsunused-file
src/core/parsers/change-parser.ts:DeltaSectionunused-symbol
vitest.setup.ts:teardownunused-export
src/core/artifact-graph/types.ts:ApplyPhaseunused-export
src/core/converters/json-converter.ts:Changeunused-import
src/core/converters/json-converter.ts:Specunused-import
src/core/init.ts:SKILL_NAMESunused-import
src/core/init.ts:getToolSkillStatusunused-import

The code number leaves out tests, fixtures, docs, examples, data files, styles, translations and vendored code, and 13 generated files: src/core/templates/workflows/apply-change.ts, src/core/templates/workflows/archive-change.ts, src/core/templates/workflows/bulk-archive-change.ts, src/core/templates/workflows/continue-change.ts, src/core/templates/workflows/explore.ts, src/core/templates/workflows/feedback.ts, src/core/templates/workflows/ff-change.ts, src/core/templates/workflows/new-change.ts, src/core/templates/workflows/onboard.ts, src/core/templates/workflows/propose.ts, src/core/templates/workflows/sync-specs.ts, src/core/templates/workflows/update-change.ts, src/core/templates/workflows/verify-change.ts.

Largest clones in the code

17 lines in 2 placestypescript223 tokens

src/ui/ascii-patterns.ts:106–122src/ui/ascii-patterns.ts:119–135

106  `${_}${_}${D}${_}${F}${F}${_}${D}`,
107  `${_}${_}${_}${F}${_}${_}${F}${_}`,
108  `${_}${_}${_}${_}${F}${F}${_}${_}`,
109],
110// Frame 7: Full logo
111[
112  `${_}${_}${_}${_}${_}${_}${_}${_}`, // padding row 1
113  `${_}${_}${_}${_}${_}${_}${_}${_}`, // padding row 2
114  `${_}${_}${_}${_}${_}${_}${_}${_}`, // padding row 3
115  `${_}${_}${_}${_}${F}${F}${_}${_}`,

119  `${_}${_}${F}${_}${F}${F}${_}${F}`,
120  `${_}${_}${_}${F}${_}${_}${F}${_}`,
121  `${_}${_}${_}${_}${F}${F}${_}${_}`,
122],
123// Frame 8: Hold complete logo
124[
125  `${_}${_}${_}${_}${_}${_}${_}${_}`, // padding row 1
126  `${_}${_}${_}${_}${_}${_}${_}${_}`, // padding row 2
127  `${_}${_}${_}${_}${_}${_}${_}${_}`, // padding row 3
128  `${_}${_}${_}${_}${F}${F}${_}${_}`,

First 10 of 17 lines, the second copy on the right.

15 lines in 5 placestypescript54 tokens

src/core/command-generation/adapters/crush.ts:20–34src/core/command-generation/adapters/devin.ts:26–40src/core/command-generation/adapters/lingma.ts:20–34src/core/command-generation/adapters/qoder.ts:20–34src/core/command-generation/adapters/zcode.ts:23–37

20    return path.join('.crush', 'commands', 'opsx', `${commandId}.md`);
21  },
22
23  formatFile(content: CommandContent): string {
24    return `---
25name: ${escapeYamlValue(content.name)}
26description: ${escapeYamlValue(content.description)}
27category: ${escapeYamlValue(content.category)}
28tags: ${formatTagsArray(content.tags)}
29---

First 10 of 15 lines.

24 lines in 3 placestypescript107 tokens

src/core/completions/installers/bash-installer.ts:251–274src/core/completions/installers/fish-installer.ts:84–107src/core/completions/installers/zsh-installer.ts:262–285

251        'If completions are not working, try: exec bash',
252      ],
253    };
254  }
255  // File exists but content is different - this is an update
256  isUpdate = true;
257} catch (error: any) {
258  // File doesn't exist or can't be read, proceed with installation
259  console.debug(`Unable to read existing completion file at ${targetPath}: ${error.message}`);
260}

First 10 of 24 lines.

7 more

22 lines in 2 placestypescript202 tokens
src/core/completions/generators/powershell-generator.ts:89–110 src/core/completions/generators/powershell-generator.ts:155–176
9 lines in 2 placestypescript162 tokens
src/ui/ascii-patterns.ts:34–42 src/ui/ascii-patterns.ts:35–43
9 lines in 3 placestypescript73 tokens
src/core/artifact-graph/resolver.ts:315–323 src/core/artifact-graph/resolver.ts:340–348 src/core/artifact-graph/resolver.ts:364–372
12 lines in 2 placestypescript144 tokens
src/ui/ascii-patterns.ts:41–52 src/ui/ascii-patterns.ts:54–65
8 lines in 3 placestypescript72 tokens
src/ui/ascii-patterns.ts:43–50 src/ui/ascii-patterns.ts:82–89 src/ui/ascii-patterns.ts:95–102
14 lines in 2 placestypescript132 tokens
src/core/completions/generators/bash-generator.ts:92–105 src/core/completions/generators/bash-generator.ts:141–154
19 lines in 2 placestypescript131 tokens
src/core/converters/json-converter.ts:43–61 src/core/validation/validator.ts:893–913

Largest clones over all files, tests and data included

172 lines in 2 placesmarkdowntests2,116 tokens

openspec/changes/archive/2025-12-23-extend-shell-completions/specs/cli-completion/spec.md:123–294openspec/specs/cli-completion/spec.md:168–339

123### Requirement: Installation Automation
124
125The completion command SHALL automatically install completion scripts into shell configuration files for all supported shells.
126
127#### Scenario: Installing for Oh My Zsh
128
129- **WHEN** user executes `openspec completion install zsh`
130- **THEN** detect if Oh My Zsh is installed by checking for `$ZSH` environment variable or `~/.oh-my-zsh/` directory
131- **AND** create custom completions directory at `~/.oh-my-zsh/custom/completions/` if it doesn't exist
132- **AND** write completion script to `~/.oh-my-zsh/custom/completions/_openspec`

First 10 of 172 lines.

16 lines in 4 placesmarkdowndocs and examples648 tokens

skills/openspec-apply-change/SKILL.md:12–27skills/openspec-continue-change/SKILL.md:12–27skills/openspec-ff-change/SKILL.md:12–27skills/openspec-new-change/SKILL.md:12–27

12Implement tasks from an OpenSpec change.
13
14**Store selection:** If the user names a store (a store is a standalone OpenSpec repo registered on this machine) or the work lives in one, run `openspec store…
15
16**Project check:** These steps expect a project that already uses OpenSpec. Before the first step that writes anything (`new change`, `archive`, `sync specs`, …
17
18One `"root": null` is not about setup: when a `status` error message starts with `Declared in` or `Invalid store declaration in` and names this project's `open…
19
20Otherwise, with no root, what happens next depends on how this workflow was reached:
21

First 10 of 16 lines.

12 lines in 4 placesmarkdowndocs and examples636 tokens

skills/openspec-apply-change/SKILL.md:14–25skills/openspec-bulk-archive-change/SKILL.md:16–27skills/openspec-explore/SKILL.md:18–29skills/openspec-onboard/SKILL.md:14–25

14**Store selection:** If the user names a store (a store is a standalone OpenSpec repo registered on this machine) or the work lives in one, run `openspec store…
15
16**Project check:** These steps expect a project that already uses OpenSpec. Before the first step that writes anything (`new change`, `archive`, `sync specs`, …
17
18One `"root": null` is not about setup: when a `status` error message starts with `Declared in` or `Invalid store declaration in` and names this project's `open…
19
20Otherwise, with no root, what happens next depends on how this workflow was reached:
21
22- **Auto-selected**: you chose this workflow yourself, without the user naming OpenSpec, naming this skill, or running its slash command. Stop using OpenSpec a…
23- **Explicit OpenSpec request**: the user named OpenSpec, named this skill, or ran its slash command. Stop before writing and ask how to proceed: set this proj…

First 10 of 12 lines.

29 lines in 4 placesmarkdowntests583 tokens
openspec/changes/archive/2025-10-14-add-github-copilot-prompts/specs/cli-init/spec.md:20–48 openspec/changes/archive/2025-10-22-add-cline-support/specs/cli-init/spec.md:69–97 openspec/changes/archive/2025-10-22-add-crush-support/specs/cli-init/spec.md:39–67 openspec/changes/archive/2025-10-22-add-factory-slash-commands/specs/cli-init/spec.md:26–54
89 lines in 2 placesmarkupmarkup1,672 tokens
assets/openspec_pixel_light.svg:1–89 website/public/openspec-pixel.svg:1–89

By format, code only

Format	Files	Lines	Clones	Duplicated lines	Duplication
typescript	177	43,000	80	1,153	2.68%
javascript	11	1,088	0	0	0%
bash	10	786	0	0	0%
tsx	8	385	0	0	0%
perl	1	174	0	0	0%

By format, all files

Format	Files	Lines	Clones	Duplicated lines	Duplication
typescript	419	127,926	1,005	11,337	8.86%
markdown	700	78,855	363	7,861	9.97%
text	96	3,879	15	169	4.36%
yaml	45	1,815	4	55	3.03%
bash	46	1,560	3	13	0.83%
json	18	931	2	45	4.83%
markup	7	308	1	89	28.9%
nix	2	22	1	11	50%
javascript	11	1,088	0	0	0%
tsx	11	527	0	0	0%

Trending appearances

Day	Rank	Stars	Files	Lines	Clones	All files	Code	Health	Commit
Sep 19, 2026	#7	69,435 (+296)	1,360	217,187	1,394	9.02%	2.54%	C 62.1	`bae58cf`

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