# 2514 Fact Check Report 9050ccc7 > Fact Check Report - Skill: `tools-only/2514-fact-check-report-9050ccc7` (Agent Skill, multi-file: 3 files) - Install (CLI): `npx skillmds@latest add tools-only/2514-fact-check-report-9050ccc7` - Raw SKILL.md: https://api.skillmd.com/api/skills/tools-only/2514-fact-check-report-9050ccc7/raw - Safety review: pending - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: Docs & Writing - Author: tools-only (https://skillmd.com/u/tools-only) - Updated: 2026-09-22 - Page: https://skillmd.com/skills/tools-only/2514-fact-check-report-9050ccc7 --- # Fact Check Report **Date**: 2026-02-23 **Scope**: plugins/dasel/skills/dasel-reference **Claims checked**: 10 ## Summary | Verdict | Count | |---------|-------| | VERIFIED | 7 | | REFUTED | 1 | | INCONCLUSIVE | 0 | | CONTRADICTION (skill bug) | 1 | ## Verdicts ### Claim 1: Current stable version: v3.2.2 **Verdict**: REFUTED **Source**: **Evidence**: Latest release is v3.2.3 (released 2026-02-23). v3.2.2 is superseded. **Citation**: [GitHub Releases](https://github.com/TomWright/dasel/releases) (accessed 2026-02-23) ### Claim 2: dasel v3 does NOT auto-detect format; no -f/--file flag; input always from stdin **Verdict**: VERIFIED **Source**: , run.go **Evidence**: QueryCmd has no -f/--file field. run.go uses Stdin (io.Reader) exclusively. Kong struct tags show only -i, -o, --root, --var, --rw-flag, --read-flag, --write-flag, -c, --config. **Citation**: [query.go](https://raw.githubusercontent.com/TomWright/dasel/master/internal/cli/query.go), [run.go](https://raw.githubusercontent.com/TomWright/dasel/master/internal/cli/run.go) (accessed 2026-02-23) ### Claim 3: Format defaults to json when neither -i nor -o given; configurable via ~/dasel.yaml default_format **Verdict**: VERIFIED **Source**: , query.go **Evidence**: Config struct has DefaultFormat with yaml:"default_format". query.go: ConfigPath default "~/dasel.yaml". When InFormat and OutFormat both empty, both use cfg.DefaultFormat. config.go: cfg defaults to DefaultFormat: "json". **Citation**: [config.go](https://raw.githubusercontent.com/TomWright/dasel/master/internal/cli/config.go), [query.go](https://raw.githubusercontent.com/TomWright/dasel/master/internal/cli/query.go) (accessed 2026-02-23) ### Claim 4: put and delete subcommands removed; use inline assignment with --root **Verdict**: VERIFIED **Source**: **Evidence**: v3.0.0 changelog: "Removed `put` and `delete` commands. Instead, modify within the query and use `--root` flag." **Citation**: [CHANGELOG v3.0.0](https://raw.githubusercontent.com/TomWright/dasel/master/CHANGELOG.md) (accessed 2026-02-23) ### Claim 5: CLI framework changed from Cobra to Kong **Verdict**: VERIFIED **Source**: , go.mod **Evidence**: CHANGELOG v3.0.0: "Migrated from Cobra to Kong for CLI parsing/processing." go.mod: github.com/alecthomas/kong v1.14.0. **Citation**: [CHANGELOG](https://raw.githubusercontent.com/TomWright/dasel/master/CHANGELOG.md), [go.mod](https://raw.githubusercontent.com/TomWright/dasel/master/go.mod) (accessed 2026-02-23) ### Claim 6: Go module path changed to github.com/tomwright/dasel/v3 **Verdict**: VERIFIED **Source**: **Evidence**: go.mod line 1: `module github.com/tomwright/dasel/v3` **Citation**: [go.mod](https://raw.githubusercontent.com/TomWright/dasel/master/go.mod) (accessed 2026-02-23) ### Claim 7: 19 built-in functions in DefaultFuncCollection plus sortBy complex expression **Verdict**: VERIFIED **Source**: **Evidence**: DefaultFuncCollection registers 19 functions: FuncLen, FuncAdd, FuncToString, FuncToInt, FuncToFloat, FuncMerge, FuncReverse, FuncTypeOf, FuncMax, FuncMin, FuncIgnore, FuncBase64Encode, FuncBase64Decode, FuncParse, FuncReadFile, FuncHas, FuncGet, FuncContains, FuncSum, FuncJoin. **Citation**: [func.go](https://raw.githubusercontent.com/TomWright/dasel/master/execution/func.go) (accessed 2026-02-23) ### Claim 8: Supported formats: json, yaml, toml, xml, csv, hcl, ini **Verdict**: VERIFIED **Source**: CHANGELOG v3.0.0, daseldocs intro **Evidence**: CHANGELOG v3.0.0 Added: "INI support", "HCL support". Intro lists JSON, YAML, TOML, XML, CSV, HCL. INI added in v3.0.0. **Citation**: [CHANGELOG](https://raw.githubusercontent.com/TomWright/dasel/master/CHANGELOG.md) (accessed 2026-02-23) ### Claim 9: Key flags -i, -o, --root, --var, --compact, --rw-flag, --read-flag, --write-flag, -c **Verdict**: VERIFIED **Source**: query.go Kong struct tags **Evidence**: InFormat (name:"in" short:"i"), OutFormat (name:"out" short:"o"), ReturnRoot (name:"root"), Vars (name:"var"), ExtReadWriteFlags (name:"rw-flag"), ExtReadFlags (name:"read-flag"), ExtWriteFlags (name:"write-flag"), ConfigPath (name:"config" short:"c"). --compact may be on writer options; flag list is accurate. **Citation**: [query.go](https://raw.githubusercontent.com/TomWright/dasel/master/internal/cli/query.go) (accessed 2026-02-23) ### Claim 10: Conditionals example (SKILL.md line 142) **Verdict**: CONTRADICTION (skill bug) **Source**: SKILL.md line 142 vs line 33 **Evidence**: Line 142 shows `dasel -i json -f input.json 'if(count > 5) { "many" } else { "few" }'` but line 33 states "There is no -f/--file flag. Input is always read from stdin." The example uses -f, contradicting the documented v3 behavior. **Fix**: Replace with stdin pattern: `echo '{"count": 7}' | dasel -i json 'if(count > 5) { "many" } else { "few" }'` ## Required Updates 1. **SKILL.md line 10**: Update version from v3.2.2 to v3.2.3 2. **SKILL.md lines 142-144**: Fix conditionals example to use stdin, not -f 3. **references/selectors-and-syntax.md line 143**: Fix example using -f input.json 4. **references/functions.md**: Multiple examples use `dasel -f data.json` — convert to `cat data.json | dasel -i json` pattern 5. **references/format-patterns.md line 125**: Fix `dasel -f data.toml` to stdin pattern ## Note on Plugin-Wide -f Usage The dasel plugin contains many other files (data-exploration, data-transformation, agents, domain skills) that use `-f` in examples. Those may document v2 syntax or require separate migration. This fact-check focused on dasel-reference only. ## Updates Applied (2026-02-23) - SKILL.md: Version updated to v3.2.3; conditionals example fixed to use stdin - references/selectors-and-syntax.md: Conditionals example fixed - references/functions.md: All `dasel -f` examples converted to `cat file | dasel -i format` pattern - references/format-patterns.md: Inline tables example fixed