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[PR #7058] [MERGED] fix(cli): format arrays of empty objects without keys as JSON #7612

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opened 2026-11-03 13:39:06 +00:00 by bsakaguchi · 0 comments

bsakaguchi commented

2026-11-03 13:39:06 +00:00

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📋 Pull Request Information

Original PR: https://github.com/morluto/rea/pull/7058
Author: @viniciusdsandrade
Created: 10/25/2026
Status: ✅ Merged
Merged: 10/25/2026
Merged by: @morluto

Base: main ← Head: fix/7057-cli-markdown-empty-objects

📝 Commits (1)

25c04e6 fix(cli): format arrays of empty objects without keys as JSON

📊 Changes

3 files changed (+21 additions, -1 deletions)

View changed files

📝 src/cli/cliOutputFormatter.ts (+4 -1)
📝 tests/boundary/cli/cliOutput.test.ts (+8 -0)
📝 tests/boundary/cli/filteredArrayOutput.test.ts (+9 -0)

📄 Description

Summary

Fixes #7057. When formatting an array of objects that have no own enumerable keys (such as [{}] or [{}, {}]) as Markdown via --format md, formatObjectTable derived an empty header list (headers = []) and called renderTable([], rows), emitting malformed Markdown table syntax (| |\n||\n| |). This change requires at least one object with own keys in isObjectArray and falls back to JSON serialization when headers are empty.

Problem and expected behavior

Trigger: Format an array of empty objects as Markdown, e.g. formatCliOutput([{}], "md") or renderCliDocument([{}], "md", false).
Observed: isObjectArray evaluated to true because every element was a non-null object, but no element had own enumerable keys. renderTable produced an empty header row | |, an invalid delimiter row || with zero column separators, and rows | |. Under GitHub Flavored Markdown (GFM), a table requires at least one column with a valid delimiter row containing hyphens (|---|).
Expected: Arrays without column keys are formatted as JSON text ([{}] or [{},{}]), consistent with how non-tabular arrays and scalar values are rendered in Markdown.

Change and scope

src/cli/cliOutputFormatter.ts:
- isObjectArray: added value.some((item) => Object.keys(item).length > 0) so arrays of empty objects are not classified as tabular object arrays.
- formatObjectTable: added if (headers.length === 0) return markdownCell(items); as defensive fallback when no headers exist.
- renderTable: added if (headers.length === 0) return ""; to ensure a table with 0 columns is never emitted.
tests/boundary/cli/cliOutput.test.ts: added regression test verifying renderCliDocument([{}], "md", false) produces "[{}]\n", [{}, {}] produces "[{},{}]\n", and { empty: [{}] } produces "## empty\n\n[{}]\n".
tests/boundary/cli/filteredArrayOutput.test.ts: added test verifying runFilteredCli([{}, {}], "md") outputs "[{},{}]\n".

Follow the contribution scope: ordinary bug fix within existing CLI output boundaries; maintainer scope decision is not applicable.

Contract and boundary impact

Semantic owner and earliest changed stage: CLI output formatting (src/cli/cliOutputFormatter.ts).
Contribution scope fit and linked maintainer decision: not applicable; routine fix for CLI output formatting.
CLI and MCP/tool-catalog contract: unchanged.
Provider, bridge, target-format, or platform compatibility: all platforms.
Evidence, artifact, provenance, or reconstruction contract: unchanged.
Target selection, authority, upstream behavior, and cleanup details: not applicable.
Generated metadata: none.

Expected effects:

Read existing files or captured data.
Launch or attach to a process.
Inject instrumentation or run scripts/code.
Change process memory, registers, files, or configuration.
Contact network services.
Recover protected code or work around protections.
Documentation or usability only; no target interaction.
Not sure yet; investigation or maintainer guidance needed.

Evidence and regression coverage

Tests added or updated:
- tests/boundary/cli/cliOutput.test.ts: formats arrays of empty objects without column keys as JSON in Markdown.
- tests/boundary/cli/filteredArrayOutput.test.ts: formats arrays of empty objects without columns as JSON in Markdown.
Base reproduction or other evidence: source-derived analysis showing renderTable([], [[]]) outputs invalid markdown table syntax | |\n||\n| |.
User-visible CLI/MCP output: formatCliOutput([{}], "md") returns "[{}]" instead of malformed table markup.
Remaining proof gaps: full CI execution on GitHub Actions.

Validation performed

Source review of touched files against project style and lint conventions.
Local verification commands were intentionally omitted; verification relies on PR CI.

Compatibility, safety, and release

Breaking changes or migration steps: none.
Real Hopper/Ghidra, browser, or OS coverage: platform-independent formatting logic.
Package or release metadata impact: none.
Security, privacy, process, or containment review: pure formatting change, no process or filesystem effects.

Author readiness

Human owner: @viniciusdsandrade

I reviewed the final diff and relevant existing code, understand the change and its edge cases, and take responsibility for the complete PR, including AI-assisted work.
I checked the evidence above, confirmed it supports the current change, and recorded meaningful validation gaps.
I declare this PR ready for initial maintainer review.

Before merge

This PR addresses a concrete problem or an agreed enhancement.
Material scope and authority questions are resolved, and any required maintainer scope decision covers the final diff.
The PR has one focused outcome and the title follows type(scope): outcome.
Related issue is linked, or the reason for not linking one is stated above.
Tests cover changed observable behavior and meaningful failure paths.
Owning docs, contracts, and generated metadata are updated where needed.
User-visible CLI/MCP changes include representative output.
I checked the final diff for secrets, unrelated cleanup, and unsupported claims.

_{🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.}

## 📋 Pull Request Information **Original PR:** https://github.com/morluto/rea/pull/7058 **Author:** [@viniciusdsandrade](https://github.com/viniciusdsandrade) **Created:** 10/25/2026 **Status:** ✅ Merged **Merged:** 10/25/2026 **Merged by:** [@morluto](https://github.com/morluto) **Base:** `main` ← **Head:** `fix/7057-cli-markdown-empty-objects` --- ### 📝 Commits (1) - [`25c04e6`](https://github.com/morluto/rea/commit/25c04e696a9e34365811b16b368070a1fb1b6006) fix(cli): format arrays of empty objects without keys as JSON ### 📊 Changes **3 files changed** (+21 additions, -1 deletions) <details> <summary>View changed files</summary> 📝 `src/cli/cliOutputFormatter.ts` (+4 -1) 📝 `tests/boundary/cli/cliOutput.test.ts` (+8 -0) 📝 `tests/boundary/cli/filteredArrayOutput.test.ts` (+9 -0) </details> ### 📄 Description ## Summary Fixes #7057. When formatting an array of objects that have no own enumerable keys (such as `[{}]` or `[{}, {}]`) as Markdown via `--format md`, `formatObjectTable` derived an empty header list (`headers = []`) and called `renderTable([], rows)`, emitting malformed Markdown table syntax (`| |\n||\n| |`). This change requires at least one object with own keys in `isObjectArray` and falls back to JSON serialization when headers are empty. ## Problem and expected behavior Trigger: Format an array of empty objects as Markdown, e.g. `formatCliOutput([{}], "md")` or `renderCliDocument([{}], "md", false)`. Observed: `isObjectArray` evaluated to `true` because every element was a non-null object, but no element had own enumerable keys. `renderTable` produced an empty header row `| |`, an invalid delimiter row `||` with zero column separators, and rows `| |`. Under GitHub Flavored Markdown (GFM), a table requires at least one column with a valid delimiter row containing hyphens (`|---|`). Expected: Arrays without column keys are formatted as JSON text (`[{}]` or `[{},{}]`), consistent with how non-tabular arrays and scalar values are rendered in Markdown. ## Change and scope - `src/cli/cliOutputFormatter.ts`: - `isObjectArray`: added `value.some((item) => Object.keys(item).length > 0)` so arrays of empty objects are not classified as tabular object arrays. - `formatObjectTable`: added `if (headers.length === 0) return markdownCell(items);` as defensive fallback when no headers exist. - `renderTable`: added `if (headers.length === 0) return "";` to ensure a table with 0 columns is never emitted. - `tests/boundary/cli/cliOutput.test.ts`: added regression test verifying `renderCliDocument([{}], "md", false)` produces `"[{}]\n"`, `[{}, {}]` produces `"[{},{}]\n"`, and `{ empty: [{}] }` produces `"## empty\n\n[{}]\n"`. - `tests/boundary/cli/filteredArrayOutput.test.ts`: added test verifying `runFilteredCli([{}, {}], "md")` outputs `"[{},{}]\n"`. Follow the contribution scope: ordinary bug fix within existing CLI output boundaries; maintainer scope decision is not applicable. ## Contract and boundary impact - Semantic owner and earliest changed stage: CLI output formatting (`src/cli/cliOutputFormatter.ts`). - Contribution scope fit and linked maintainer decision: not applicable; routine fix for CLI output formatting. - CLI and MCP/tool-catalog contract: unchanged. - Provider, bridge, target-format, or platform compatibility: all platforms. - Evidence, artifact, provenance, or reconstruction contract: unchanged. - Target selection, authority, upstream behavior, and cleanup details: not applicable. - Generated metadata: none. Expected effects: - [ ] Read existing files or captured data. - [ ] Launch or attach to a process. - [ ] Inject instrumentation or run scripts/code. - [ ] Change process memory, registers, files, or configuration. - [ ] Contact network services. - [ ] Recover protected code or work around protections. - [x] Documentation or usability only; no target interaction. - [ ] Not sure yet; investigation or maintainer guidance needed. ## Evidence and regression coverage - Tests added or updated: - `tests/boundary/cli/cliOutput.test.ts`: formats arrays of empty objects without column keys as JSON in Markdown. - `tests/boundary/cli/filteredArrayOutput.test.ts`: formats arrays of empty objects without columns as JSON in Markdown. - Base reproduction or other evidence: source-derived analysis showing `renderTable([], [[]])` outputs invalid markdown table syntax `| |\n||\n| |`. - User-visible CLI/MCP output: `formatCliOutput([{}], "md")` returns `"[{}]"` instead of malformed table markup. - Remaining proof gaps: full CI execution on GitHub Actions. ## Validation performed - Source review of touched files against project style and lint conventions. - Local verification commands were intentionally omitted; verification relies on PR CI. ## Compatibility, safety, and release - Breaking changes or migration steps: none. - Real Hopper/Ghidra, browser, or OS coverage: platform-independent formatting logic. - Package or release metadata impact: none. - Security, privacy, process, or containment review: pure formatting change, no process or filesystem effects. ## Author readiness Human owner: @viniciusdsandrade - [x] I reviewed the final diff and relevant existing code, understand the change and its edge cases, and take responsibility for the complete PR, including AI-assisted work. - [x] I checked the evidence above, confirmed it supports the current change, and recorded meaningful validation gaps. - [x] I declare this PR ready for initial maintainer review. ## Before merge - [x] This PR addresses a concrete problem or an agreed enhancement. - [x] Material scope and authority questions are resolved, and any required maintainer scope decision covers the final diff. - [x] The PR has one focused outcome and the title follows `type(scope): outcome`. - [x] Related issue is linked, or the reason for not linking one is stated above. - [x] Tests cover changed observable behavior and meaningful failure paths. - [x] Owning docs, contracts, and generated metadata are updated where needed. - [x] User-visible CLI/MCP changes include representative output. - [x] I checked the final diff for secrets, unrelated cleanup, and unsupported claims. --- <sub>🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.</sub>

bsakaguchi

2026-11-03 13:39:06 +00:00

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