Two low-risk seam moves to enable selling per-tool subsets without
breaking the existing all-in-one bundle. Behaviour identical; every
existing import still resolves; full pytest suite + every page returns
HTTP 200.
1. **Tool registry** (src/gui/tools_registry.py) — replaces the
inline dict-of-dicts in app.py with a Tool dataclass and a TOOLS
list. Adds a tier field ("core" today, "pro" / "enterprise" later)
and tools_for_tier() / tool_by_id() / display_name() helpers. A
per-tool build slices TOOLS at import time without code changes.
2. **components package** (src/gui/components/) — converts the former
single components.py into a package with:
_legacy.py — original file, unchanged.
__init__.py — re-exports the legacy surface; existing
"from src.gui.components import …" calls
continue to work.
shared.py — hide_streamlit_chrome, pickup_or_upload
(every build needs these).
gate.py — require_normalization_gate (Pro / Suite SKUs).
findings.py — analyzer-finding widgets (drops out of a
standalone-Dedup build).
dedup_review.py — match-group cards + apply pipeline (drops out
of a non-dedup build).
The seam modules are narrow re-exports today. As code migrates out
of _legacy.py into the focused modules, the public import path
stays stable via the shim.
E2E: 765 passed, 17 xfailed (unchanged); home page + all 9 tool pages
+ Review page render HTTP 200; full pipeline (analyze → auto_fix →
apply_decisions → output bytes) round-trips on the kitchen-sink
fixture with zero high-confidence findings remaining post-fix.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Adds a Review & Normalize page that sits between upload and every tool
page. The analyzer now tags each finding with confidence (high/medium/low)
and a fix_action; the gate auto-applies high-confidence fixes, surfaces
medium/low ones for user review, and blocks tool pages on error-level
findings until resolved or waived.
Core (src/core/):
- analyze.py: Finding gains confidence, fix_action, pre_applied; new
detectors for encoding_uncertain, encoding_decode_failed; new top-
level encoding_override parameter.
- fixes.py: registry of fix algorithms keyed by fix_action id.
- normalize.py: auto_fix(), apply_decisions(), is_normalized(), and
the NormalizationResult / Decision dataclasses the gate consumes.
- io.py: detect_encoding tries strict UTF-8 first; repair_bytes now
transcodes UTF-16/32 to UTF-8 before NUL-strip (fixes UTF-16 corruption)
and normalizes line endings (fixes bare-CR parser crash); empty file
handled gracefully instead of EmptyDataError traceback.
GUI (src/gui/):
- pages/0_Review.py: gate page with per-finding decision controls,
encoding override picker (16 codepages + custom), and Advanced output
options (encoding, delimiter, line terminator) on the download.
- components.py: require_normalization_gate() helper.
- pages/1-9: gate guard wired on every tool page.
Test corpora:
- test-cases/encodings-corpus/: 31 encoded CSV fixtures + 9 reference
UTF-8 files + manifest, synced from Business/DataTools.
- test-cases/text-cleaner-corpus/test_data/17: synced malformed input
(unquoted $1,500.00) for the unquoted-delimiter detector.
Tests (94 new):
- test_normalize.py (48): finding fields, fix registry, auto_fix scope,
decision paths, gate idempotency, output-options helper.
- test_encodings_corpus.py (90, 16 xfailed): parametric detection +
decode + analyzer-no-crash sweep against the manifest.
- test_analyze.py: encoding override + encoding_uncertain detectors.
- test_corpus.py: pre-parse repair in the strict reader.
run_tests.py: new aliases --tool normalize, --tool encodings, --tool gate;
encodings corpus added to --fixtures category.
Docs: USER-GUIDE §3.3 covers the gate workflow, encoding override, and
output options; TECHNICAL §10.2.1-10.2.4 documents the analyzer schema,
gate API, Review page, and pre-parse repair pipeline; CLI-REFERENCE adds
the analyzer JSON schema with the new fields; README links to all of it.
Suite: 765 passed, 17 xfailed (was 458 passed).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
The Text Cleaner had two st.dataframe previews — the initial upload
preview ("Preview: filename") and the post-clean "Cleaned preview"
table — that both rendered cells with the same browser-collapses-
whitespace, hides-invisibles problem the analyzer findings panel had
before commit 1049c03.
components.render_hidden_aware_preview(df, n_rows, caption) renders a
DataFrame as an HTML table where:
- every cell uses visualize_hidden_html(mark_outer_whitespace=True),
so leading/trailing ASCII spaces appear as per-character "·" badges
- white-space: pre-wrap on every cell preserves internal multi-space
runs and embedded newlines visually
- headers route through the same visualizer so dirty column names
(NBSP padding, ZWSP, smart quotes) show their badges too
- NaN cells render as a faint "NaN" placeholder
- rows are sticky-headed and scrollable inside a 26rem capped
container so a 10-row preview doesn't push the rest of the UI off
screen
2_Text_Cleaner.py wires it into both previews:
- The upload preview gains its own "Show hidden characters in preview"
toggle (default on).
- The cleaned preview reuses the existing show_hidden toggle that
already governs the Examples changes table, so one switch controls
the whole results section.
Either toggle off falls back to the original st.dataframe view.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
The analyzer's "Run Analysis" panel rendered sample cells via st.dataframe,
which (a) silently collapses leading/trailing ASCII whitespace and (b)
displays NBSP/ZWSP/control chars as nothing. The user couldn't see the
exact pollution they were being told about.
visualize_hidden_html gains a mark_outer_whitespace=True option that
wraps each leading and trailing ASCII space/tab in its own badge with a
"SP LEAD" / "SP TRAIL" tooltip. The badges are per-character so the
user can count exactly how much padding the cleaner will strip.
components.render_findings_panel now:
- injects hidden_char_css() once at the top of the panel
- replaces st.dataframe(samples) with a custom HTML table
- renders the value column with mark_outer_whitespace=True
- applies white-space: pre-wrap on value cells so any internal ASCII
whitespace also stays visible (browsers collapse runs by default)
Four new tests cover: leading+trailing badge counts, default-off
behaviour, leading tab badge, all-whitespace string treated entirely
as leading.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
st.page_link resolves paths from the directory of the entrypoint file
(src/gui/app.py), so the existing "src/gui/{page_slug}" prefix doubled
up and produced StreamlitPageNotFoundError on first upload + analysis
(reproducible on Windows; the stack trace from a Windows install
surfaced the bug).
The _TOOL_PAGE_PATHS map already stores the correct relative form
("pages/2_Text_Cleaner.py"); just pass the slug straight to
st.page_link.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
The whole point of the cleaner is to remove characters the user can't
see — which makes the "before / after" preview nearly useless by default.
A cell with NBSP padding looks identical to a cell with regular spaces.
Two new helpers in src.core.text_clean:
visualize_hidden_text(s)
Plain-text rendering: each invisible/control/smart character is
replaced by a glyph + [LABEL] (e.g. "·[NBSP]", "→[TAB]", "∅[ZWSP]",
"""[L DQUOTE]"). Suitable for terminal output, CSV exports, anywhere
HTML is wrong. Unmapped C0 controls render as [U+XXXX].
visualize_hidden_html(s) + hidden_char_css()
HTML rendering: every flagged character is wrapped in a <span> with
a CSS class and a tooltip showing the codepoint and label. Pair with
hidden_char_css() to inject the matching styles. Three colour bands
(whitespace, special, control) so the user can scan an audit table
and spot what's being changed at a glance.
Mapping covers: ASCII tab/LF/CR, every NBSP variant (U+00A0, U+202F,
U+2009, …), zero-width family (ZWSP/ZWNJ/ZWJ/WJ/BOM/SHY), bidi marks
(LRM/RLM), all smart quotes, en/em dashes, ellipsis, prime/double-prime,
and guillemets. ASCII printable text passes through; HTML output also
escapes &/</> .
GUI wiring (src/gui/pages/2_Text_Cleaner.py)
The "Examples" changes table now defaults to a hidden-char-rendered
HTML view: every NBSP/ZWSP/smart-quote/control char is shown with its
badge and codepoint tooltip. A "Show hidden characters" toggle lets
the user fall back to the raw st.dataframe view if they prefer.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Closes the last UX gap from the analyzer review: each tool page had its
own st.file_uploader, so users had to upload the same file twice (once
on the home page for analysis, once on each tool page).
components.pickup_or_upload(label, key, types) returns either:
- a _StashedUpload shim wrapping the home-page bytes (when present and
the user hasn't asked for a different file on this page), or
- the standard st.file_uploader (when nothing is stashed or the user
clicked "Use a different file").
_StashedUpload duck-types Streamlit's UploadedFile (.name, .size,
.getvalue(), .read()) so existing tool-page code consumes it without
changes. A "Use a different file" button per page sets a session-state
override flag; a "Switch back to upload-screen file" button clears it.
Wired into 2_Text_Cleaner.py and 1_Deduplicator.py — the two pages with
working uploaders today. The remaining stub pages adopt it when they're
implemented; the helper is the public surface they'll use.
Verified by smoke-launching streamlit headless and curling the home,
text-cleaner, and deduplicator routes — all return 200 with no errors
in the server log.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Home page (src/gui/app.py) gains an upload + analyze section above the tool
grid: file uploader, "Run analysis" / "Skip" buttons, and a findings panel
grouped by destination tool. Tool cards now carry a "N findings" badge
when the active session's findings reference that tool, so the user sees
at a glance which tools their just-uploaded file would benefit from.
src/gui/components.py adds the shared GUI surface:
- TOOL_DISPLAY_NAMES + tool_display_name() — single source of truth for
GUI labels, keeping detector tool ids decoupled from the UI.
- render_findings_panel(findings) — severity icons, expander per tool,
open-tool page link, sample-cells dataframe.
- upload_and_analyze_section() — the home-page widget; stashes file
bytes and findings in session_state so future tool pages can pick up
the existing upload instead of re-prompting.
- findings_count_for_tool(tool_id) — used by app.py to badge cards.
CSV/TSV uploads run through repair_bytes() before analysis, so the user
also sees csv_bom_stripped / csv_smart_quotes_folded findings synthesized
from the pre-parse repair pass. Excel uploads skip that step.
The Text Cleaner tool card flips from "Coming Soon" to "Ready" — that has
been true since the v3.0 implementation and the home page just hadn't been
updated.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
python -m src.gui now opens Chrome with --app flag, hiding the address
bar, tabs, and bookmarks bar. Falls back to default browser if Chrome
is not found. Headless flag passed via CLI so streamlit run directly
still auto-opens normally.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Add shared hide_streamlit_chrome() helper that removes header bar,
hamburger menu, footer, and deploy button via CSS injection. Called
on every page. Add .streamlit/config.toml with minimal toolbar mode.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Convert single-page deduplicator into a multi-page suite. Home page shows
tool card grid. Deduplicator extracted to its own page (fully working).
8 stub pages added for Text Cleaner, Format Standardizer, Missing Values,
Column Mapper, Outlier Detector, Multi-File Merger, Validator & Reporter,
and Pipeline Runner — each with functional file upload and coming-soon UI.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Delimiter dropdown now includes "Other" option with a text input for
custom delimiter characters. Subtitle updated to mention delimited text.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Auto-detects delimiter on upload and shows a selectbox with comma, tab,
semicolon, and pipe options. Changing re-reads the file immediately.
Line terminators (Windows/Unix/Mac) already handled by universal newlines.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Shows a read-only preview of the output rows below the editor,
updating as checkboxes and column dropdowns are changed.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Only the row chosen by the survivor rule (first, last, most-recent, etc.)
is checked by default. Other rows start unchecked.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Replace separate checkbox row and "Customize columns" toggle with a
unified st.data_editor grid — Keep checkboxes at the start of each row,
differing columns render as inline selectbox dropdowns.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Replace radio + Merge/Keep Both buttons with per-row checkboxes
and a single Confirm button. Users can now:
- Keep all rows (not duplicates) — check all, confirm
- Merge to one row — uncheck all but one, optionally customize columns
- Split a group — keep some rows, remove others (new capability)
Decision format changed from {action, survivor_idx, overrides} to
{keep_indices, overrides}. apply_review_decisions() updated to handle
all three modes. Batch actions updated accordingly.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Each match group card now has:
- Radio button to pick which row to keep as the base survivor
- "Customize columns" toggle showing only columns that differ
- Per-column selectbox to pick values from any row in the group
- Decisions stored as {action, survivor_idx, overrides} dicts
Added apply_review_decisions() that builds the final DataFrame by
applying survivor selection + column overrides without re-running
the dedup engine. Batch actions also use the new dict format.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Replace st.rerun() with on_click callbacks so decisions write to
session state before the natural rerun. Decided groups auto-collapse
with status in the label; undecided groups stay expanded. Added undo
button on decided groups.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Rewrite README.md with project overview, quick-start, and CLI summary
- Add docs/CLI-REFERENCE.md with full flag reference and 8 recipe sections
- Add docs/DEVELOPER.md with architecture, data flow, and extension guides
- Rewrite src/core/__init__.py with public API exports and module docstring
- Add Streamlit GUI (src/gui/) with file upload, advanced options, interactive
match group review with side-by-side diff, and download buttons
- Add .gitignore, requirements.txt, all source code, tests, and sample data
- Add streamlit to requirements.txt
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
