Cpp_TextFinder_Cmdline, the single place in the C++
implementation where switch letters, argument syntax, and defaults are known.
parse returns std::expected because the binary needs two
things from a failure: the signal, and the text to write.
ProgramCommands equals the result of parsing an empty command line, which makes the bare-command-line case a one-liner./ss and a bare / each have one answer./P clears its default on first occurrence using one bit of state, because inferring it would fail on -P ..Cpp_TextFinder_Cmdline converts argc/argv into a
struct that controls the other two libraries. It is the single place in the C++
implementation where switch letters, argument syntax, and defaults are known, and it
performs no traversal, no matching, no file I/O, and no stream writing.
Cpp_TextFinder_Cmdline.ixx exports four functions
and one struct, at global scope rather than in a namespace.
export struct ProgramCommands {
std::vector<std::string> rootPaths{"."}; // /P
std::vector<std::string> extensions{}; // /p
std::string regexText{"."}; // /r
bool recurse{true}; // /s
bool suppressOnNoMatch{true}; // /h
bool verbose{false}; // /v
bool help{false}; // /H
bool lineNumbers{false}; // /n
bool matchedLine{false}; // /L
};
export std::expected<ProgramCommands, std::string> parse(int argc, char* argv[]);
export std::string usageLine();
export std::string helpText();
export std::string optionsText(const ProgramCommands& commands);Cpp_TextFinder_Cmdline::helpText() in three places; the cross-document review
listed it under "will not compile" and the qualification came out.
parse returns std::expected because
Cpp_TextFinder_Entry needs two things from a failure: the signal, and the text
to write. A bool plus an out-parameter would carry the same information and
make the caller's error path two statements instead of one.
ProgramCommands is a copyable value type with no invariants: every field
combination the parser can produce is valid. Cpp_TextFinder_Dirnav holds a
reference to the instance Cpp_TextFinder_Entry owns rather than a copy, so that
instance must outlive the Cpp_TextFinder_Dirnav it was passed to - a lifetime
rule fixed here and relied on there.
ProgramCommands equals the result of parsing an empty command line, which is
what makes step 4 of the Entry startup sequence a one-liner: the bare command line prints
the listing of a default-constructed struct.
/P accumulation rule
stated five times. The C++ table went; the help block moved to the project specification,
where it binds four languages instead of one; and the field comments stayed.
suppressOnNoMatch for /h is the one worth pausing on: it names
what the flag does rather than what it is called, so the gating check in
Cpp_TextFinder_Dirnav reads as a sentence.
parse scans argv[1] through argv[argc-1] left to
right, alternating switch token and argument token. It stops at the first violation and
returns that diagnostic; no partial result is produced. It touches no filesystem: root paths
are not tested for existence, and extensions are not compared against any file.
/ or -, the second one of
the nine letters. A token with no introducer is not a switch; any other
introducer-led token, including a bare / or -, is an
unrecognized switch./ or -, since there are
no bare flags. A switch with no following token is missing its argument.true or
false under ASCII case folding. /r and /P take
the token verbatim and each rejects an empty argument. /p is
normalized./P clears the default
{"."} on its first occurrence and appends thereafter, preserving argv
order. Every other switch overwrites any earlier value, silently discarding it./ss, -abc, and a bare
/ each satisfied both conditions, and two implementations could have reported
different reason lines for the same token while both following the specification. The
code reads the partition directly: the introducer test comes first and returns
not a switch, then the length-and-letter test returns
unrecognized switch.
sawRootPath,
and the code carries it as a local rather than inferring it from the vector's contents.
Inferring would work until a user typed -P ., which is indistinguishable from
the default by value.
usageLine() - so
Cpp_TextFinder_Entry writes the returned string to stderr unaltered. Six of
the seven rows are the library's. The seventh, a malformed /r, is detected
later: Cpp_TextFinder_Dirnav compiles the expression and lets the failure
propagate, and the binary composes the diagnostic from the same table. Neither library
composes it - the one supplies a string, the other raises the failure, and the binary joins
them.
/p list.
Duplicates resolve by rule 4, and an empty extension list means every file is searched.
/p argument arrives as one token, the shell having already removed the
quotes. Normalization implements the /p rules of Spec_TextFinder.md §5:
split on commas, trim each item, strip one leading . if present, discard empty
items, and preserve the order of the survivors.
" .cpp , , txt " therefore normalizes to cpp, txt, which is the
pair the option listing reports and the build verification checked by hand.
std::isspace reports in the C locale.
A review asked what "whitespace" meant and the answer named the function, so the code
calls it through a cast to unsigned char - the cast being the part a
specification cannot supply and an implementer must not forget.Cpp_TextFinder_Dirnav performs. An earlier version deduplicated, and the
review found the dedup ran before the dot-strip, so /p ".cpp, cpp" kept
both. Moving the dedup after the strip fixed the order; dropping it entirely was
simpler and changed no behavior.Cpp_TextFinder_Dirnav when it matches a file name
against the list, because that is where the platform question arises.
helpText() returns the text Spec_TextFinder.md §5.1 fixes with
<executable> replaced by Cpp_TextFinder. The code holds
it as a raw string literal, so the fixture and the source agree by construction.usageLine() returns its first line - the line that terminates every
usage diagnostic. helpText() is built from it, so the synopsis has one
definition.optionsText(commands) returns the resolved option set in the form
§5.3 fixes./v true, after which traversal
follows; the bare command line, after which the process exits 0; and the invalid-regex
diagnostic, where the listing precedes that diagnostic whatever /v says and
the process then exits 1. The listing reflects whatever commands holds, so its
/v line reads false in the latter two unless /v was
itself typed.
optionsText that is worth more
than it looks: it chooses none of that form and must not be read as the place the form is
decided. A reader who wants to change the listing changes Spec_TextFinder.md §5.3.
usageLine() was dropped from the interface for one turn and restored in the
next. Dropping it followed from treating a malformed regex as an ordinary error with a bare
reason line; restoring it followed from the decision to hold the seven reason lines to one
wording, which put the malformed regex back into the same table as the other six and gave
the usage line a real caller in the binary.
parse produces and owns them; the seventh sits with the binary that writes it.
C++ adopts the supplied wording unchanged, so parse returns exactly what it
returned before. What §5.2 still binds is the shape this function builds - a reason
line, a newline, then usageLine() - along with the destination, the exit code,
and what each refusal leaves on stdout.
Cpp_TextFinder_Cmdline.ixx in full. The section comments cite the C++
specification, which cites Spec_TextFinder.md in turn.
// Cpp_TextFinder_Cmdline.ixx - converts argc/argv into ProgramCommands per Spec_Cpp_TextFinder_Cmdline.md
export module Cpp_TextFinder_Cmdline;
import std;
// §4: the initializers are the sole authority in code for the defaults of Spec_TextFinder.md §5,
// so a default-constructed ProgramCommands equals the result of parsing an empty command line.
export struct ProgramCommands {
std::vector<std::string> rootPaths{"."}; // /P
std::vector<std::string> extensions{}; // /p
std::string regexText{"."}; // /r
bool recurse{true}; // /s
bool suppressOnNoMatch{true}; // /h
bool verbose{false}; // /v
bool help{false}; // /H
bool lineNumbers{false}; // /n
bool matchedLine{false}; // /L
};
export std::expected<ProgramCommands, std::string> parse(int argc, char* argv[]);
export std::string usageLine();
export std::string helpText();
export std::string optionsText(const ProgramCommands& commands);
namespace {
// §5 rule 1: the nine letters of Spec_TextFinder.md §5, in that table's order.
constexpr std::string_view switchLetters = "PprshvHnL";
// §7: whitespace is what std::isspace reports in the C locale.
bool isSpace(char c) { return std::isspace(static_cast<unsigned char>(c)) != 0; }
std::string trim(std::string_view text) {
while (!text.empty() && isSpace(text.front())) text.remove_prefix(1);
while (!text.empty() && isSpace(text.back())) text.remove_suffix(1);
return std::string{text};
}
// §7: split on commas, trim, strip one leading dot, discard empties, keep order and duplicates.
std::vector<std::string> normalizeExtensions(std::string_view argument) {
std::vector<std::string> items;
for (std::size_t pos = 0; pos <= argument.size();) {
const std::size_t comma = argument.find(',', pos);
const std::size_t end = (comma == std::string_view::npos) ? argument.size() : comma;
std::string item = trim(argument.substr(pos, end - pos));
if (!item.empty() && item.front() == '.') item.erase(0, 1);
if (!item.empty()) items.push_back(std::move(item));
if (comma == std::string_view::npos) break;
pos = comma + 1;
}
return items;
}
// §5 rule 3: true or false only, under ASCII case folding.
std::optional<bool> toBool(std::string_view token) {
std::string folded;
for (char c : token) folded += static_cast<char>(std::tolower(static_cast<unsigned char>(c)));
if (folded == "true") return true;
if (folded == "false") return false;
return std::nullopt;
}
// §6: a reason line from Spec_TextFinder.md §5.2, a newline, then the usage line.
std::string diagnostic(std::string_view reason) { return std::string{reason} + "\n" + usageLine(); }
} // namespace
std::string usageLine() {
return R"(usage: Cpp_TextFinder [/P path] [/p "ext, ext"] [/r regex] [/s bool] [/h bool] [/v bool] [/H bool] [/n bool] [/L bool])"
"\n";
}
// §8: the text Spec_TextFinder.md §5.1 fixes, with <executable> replaced by Cpp_TextFinder.
std::string helpText() {
return usageLine() + R"HELP(
/P path (.) root path for traversal; repeat to add more root paths
/p "ext, ext" () comma-separated bare extensions to search; empty searches every file
/r regex (.) regular expression evaluated against each line
/s true|false (true) recurse into subdirectories
/h true|false (true) hide files that matched nothing; errors always appear
/v true|false (false) list the resolved option set before traversal
/H true|false (false) print this help and exit
/n true|false (false) add a detail line per match, carrying the line number
/L true|false (false) add a detail line per match, carrying the line text
A matching file prints its path on one line; /n and /L add indented detail
lines beneath it. A path is never printed twice. A search ends with a line
counting the files and directories it reached.
Switch introducers / and - are equivalent. Switch letters are case-sensitive,
so /h and /H differ. Every switch takes exactly one argument; there are no bare
flags. Arguments containing whitespace or commas must be quoted.
Run with no switches at all to list the resolved options and exit without
searching.
)HELP";
}
// §8: the form Spec_TextFinder.md §5.3 fixes. This function chooses none of it.
std::string optionsText(const ProgramCommands& commands) {
const auto boolText = [](bool value) { return value ? "true" : "false"; };
std::string text;
for (const std::string& path : commands.rootPaths) text += "/P " + path + "\n";
text += "/p";
for (std::size_t i = 0; i < commands.extensions.size(); ++i) {
text += (i == 0) ? " " : ", ";
text += commands.extensions[i];
}
text += "\n";
text += "/r " + commands.regexText + "\n";
text += std::string{"/s "} + boolText(commands.recurse) + "\n";
text += std::string{"/h "} + boolText(commands.suppressOnNoMatch) + "\n";
text += std::string{"/v "} + boolText(commands.verbose) + "\n";
text += std::string{"/H "} + boolText(commands.help) + "\n";
text += std::string{"/n "} + boolText(commands.lineNumbers) + "\n";
text += std::string{"/L "} + boolText(commands.matchedLine) + "\n";
return text;
}
// §5: scans left to right, alternating switch token and argument token, stopping at the
// first violation with no partial result. Touches no filesystem.
std::expected<ProgramCommands, std::string> parse(int argc, char* argv[]) {
ProgramCommands commands;
bool sawRootPath = false;
for (int i = 1; i < argc; ++i) {
const std::string token = argv[i];
if (token.empty() || (token.front() != '/' && token.front() != '-'))
return std::unexpected(diagnostic("not a switch: " + token));
if (token.size() != 2 || switchLetters.find(token[1]) == std::string_view::npos)
return std::unexpected(diagnostic("unrecognized switch: " + token));
if (i + 1 >= argc)
return std::unexpected(diagnostic("missing argument for switch: " + token));
const std::string argument = argv[++i];
const auto asBool = [&](bool& field) -> std::optional<std::string> {
const std::optional<bool> value = toBool(argument);
if (!value) return diagnostic("invalid boolean for " + token + ": " + argument);
field = *value;
return std::nullopt;
};
std::optional<std::string> failure;
switch (token[1]) {
case 'P':
if (argument.empty()) {
failure = diagnostic("empty root path for switch: " + token);
break;
}
// §5 rule 4: the first /P clears the default, later ones append in argv order.
if (!sawRootPath) {
commands.rootPaths.clear();
sawRootPath = true;
}
commands.rootPaths.push_back(argument);
break;
case 'p':
commands.extensions = normalizeExtensions(argument);
break;
case 'r':
if (argument.empty()) {
failure = diagnostic("empty expression for switch: " + token);
break;
}
commands.regexText = argument; // verbatim; Cpp_TextFinder_Dirnav compiles it
break;
case 's': failure = asBool(commands.recurse); break;
case 'h': failure = asBool(commands.suppressOnNoMatch); break;
case 'v': failure = asBool(commands.verbose); break;
case 'H': failure = asBool(commands.help); break;
case 'n': failure = asBool(commands.lineNumbers); break;
case 'L': failure = asBool(commands.matchedLine); break;
}
if (failure) return std::unexpected(*failure);
}
return commands;
}Spec_Cpp_TextFinder_Cmdline.md. The first
covers the initial 11-section draft and the four decisions taken where the parent
specification was silent; the second covers the 12-item review, the renames that gave the
libraries their current names, a complexity analysis of 295 lines of specification around
60 lines of parser, the seven cuts that followed, and the turn that made the diagnostics
byte-identical.
# Prompts and Replies — Spec_Cpp_TextFinder_Cmdline Development
This file records the prompts and replies that produced the initial draft of [Spec_Cpp_TextFinder_Cmdline.md](Spec_Cpp_TextFinder_Cmdline.md). The library was named `Cpp_Cmdline` during these turns; a later turn renamed it to `Cpp_TextFinder_Cmdline`.
---
## Turn 1
### User
> create Spec_Cpp_TextFinder_Cmdline.md in Cpp_Spec_driven_Cmdline directory. Contents are specifications for the Cmdline library. You may use the project level Spec_TextFinder.md as an example of content and Spec_Cpp_TextFinder_Entry.md as example of structure and style.
### Assistant
Read [Spec_TextFinder.md](../../Spec_TextFinder.md), [Spec_Cpp_TextFinder_Entry.md](../Cpp_Spec_driven_TextFinder_Entry/Spec_Cpp_TextFinder_Entry.md), [Cpp_TextFinder_Structure.md](../Cpp_TextFinder_Structure.md), [Constitution.md](../../Constitution.md), and the two Entry prompts files, then created [Spec_Cpp_TextFinder_Cmdline.md](Spec_Cpp_TextFinder_Cmdline.md) with eleven sections following the Entry spec's structure:
1. **Purpose** — converts `argc`/`argv` into a program-command struct; no traversal, matching, file I/O, or stream writing.
2. **Scope** — covers only the library; switch meanings stay in the parent Spec.
3. **Responsibilities** — exports the struct and parser, recognizes both introducers, applies the multiple-occurrence rules, normalizes `/p`, reports errors without writing.
4. **Public Interface** — `ProgramCommands` struct with one field per switch, plus `parse`, `helpText`, and `optionsText`.
5. **Program Commands and Defaults** — switch-to-field mapping table with types, defaults, and accumulation.
6. **Parsing Algorithm** — eight steps from token classification through the resolved result.
7. **Error Conditions and Diagnostics** — four exact diagnostic strings; no error for duplicates or empty `/p` and `/r`.
8. **Extension-List Normalization** — split, trim, strip one leading dot, discard empties, dedupe.
9. **Help Text and Option Listing** — content of `/H` help and `/v` option listing.
10. **Build** — C++23, CMake library target, C++ module, toolchain minimums.
11. **Non-Goals** — no regex compilation, no filesystem access, no stream writing, no quote removal, no skip-list switch, no non-ASCII argv.
Flagged four decisions made where the parent specs were silent:
- **Help text ownership** — the Entry spec gives the binary `/H` and `/v` handling but never says where the text comes from. Placed `helpText()` and `optionsText()` in the library, since it owns the switch table, with Entry doing the writing.
- **Return type** — `std::expected<ProgramCommands, std::string>`, because Entry needs both a failure signal and a diagnostic to write.
- **Leading dot in `/p`** — parent §5 says extensions are bare but is silent on `.cpp`; specified stripping one leading dot so both forms work.
- **Diagnostic wording** — fixed four message forms in a table rather than leaving the strings to the implementer.
Also noted that the parent's "files with no extension are not searched" rule is `Cpp_Dirnav` behavior, referenced but not specified here.
---
## Turn 2
### User
> add to Responsibilities list: Implement as a module using C++23, and modern idomatic C++ constructs
### Assistant
Added "Is implemented as a C++ module targeting C++23, using modern idiomatic C++ constructs" as the first bullet of Section 3 in [Spec_Cpp_TextFinder_Cmdline.md](Spec_Cpp_TextFinder_Cmdline.md). Noted that it restates what Section 10 says about the module and language level, which is acceptable: Build covers the toolchain, Responsibilities now states the implementation obligation.# Prompts and Replies — Spec_Cpp_TextFinder_Cmdline Refinement
This file records the prompts and replies exchanged while refining [Spec_Cpp_TextFinder_Cmdline.md](Spec_Cpp_TextFinder_Cmdline.md) after its initial draft. The two turns that created it are recorded in [Prompts_Spec_Cpp_TextFinder_Cmdline.md](Prompts_Spec_Cpp_TextFinder_Cmdline.md). Several turns below also changed [Spec_TextFinder.md](../../Spec_TextFinder.md), [Spec_Cpp_TextFinder_Entry.md](../Cpp_Spec_driven_TextFinder_Entry/Spec_Cpp_TextFinder_Entry.md), [Cpp_TextFinder_Structure.md](../Cpp_TextFinder_Structure.md), and [Project_Tree.md](../../Project_Tree.md).
---
## Turn 1
### User
> Are there any ambiguities or other issues with this spec
### Assistant
Reviewed the spec and listed twelve items in five groups, without editing. Awaited user decisions.
**Switch classification:**
1. The two "not a switch" and "unrecognized switch" error rows overlap — `/ss`, `-abc`, and a bare `/` satisfy both. Needs a deterministic rule.
2. The claim that each error condition maps to a failure mode in parent §4 overreaches; parent §4 names three, and `not a switch` was a fourth introduced by this spec.
**Cross-document gaps:**
3. Entry §4 step 1 says the binary writes a *usage* diagnostic, but `parse` returns only a one-line reason. Ownership of the usage portion undefined.
4. `/P ""` unspecified — usage error, or pass through to `cannot open []`?
5. Entry passes the parsed commands to Dirnav, but nothing says whether Dirnav copies or references.
**Normalization precision:**
6. Duplicates discarded "after trimming" should be after the dot-strip, or `/p ".cpp, cpp"` keeps both.
7. "Whitespace" undefined.
8. The empty `/p` listing line leaves a trailing space ambiguous.
**Underspecified for code generation:**
9. `helpText()` content described but not fixed, so two builds differ.
10. The interface code block omits `export module` and names no interface unit.
11. Defaults live in three places — parent §5, this spec's §5 table, and the §4 initializers.
**Naming:**
12. The file is `Spec_Cpp_TextFinder_Cmdline.md` but the library is `Cpp_Cmdline`; `Cpp_Structure.md` links to `Spec_Cpp_Output.md` as a sibling, resolving to the wrong directory. Parent §2 and §8 link to `Cpp_TextFinder/` and `Constitution_TextFinder.md`, neither of which exists.
Also noted, without listing it, that parent §5 sent `/h false` announcements to stderr while Entry §7 routed them through the output component — a conflict already tracked in the Entry prompts file.
---
## Turn 2
### User
Provided decisions on all twelve items:
> 1. implement
> 2. implement
> 3. I can't find "usage diagnostic" please advise
> 4. Usage error
> 5. Dirnav should reference
> 6. fix
> 7. std::isspace
> 8. use trailing space
> 9. pin verbatim
> 10. fix
> 11. Make contents of 5. a note instead of binding specc
> 12. Change library name to Cpp_TextFinder_Cmdline. Change Cpp_Structure.md to Cpp_TextFinder_Structure.md. Change target names to link form. Make parent /h false announcements should be routed to Cpp_TextFinder_Output
### Assistant
Answered item 3: "usage diagnostic" does appear — in Spec_TextFinder.md §4 and in Entry §4 steps 1, 4, 6 and §7 — but no document defined its content. Resolved it by adding `usageLine()` to the library and defining a usage diagnostic as *reason line + newline + `usageLine()`*, with `helpText()`'s first line being `usageLine()` so the synopsis has one definition. `parse` returns that complete string; Entry writes it unaltered and composes the same form itself for the two failures the library cannot see.
Applied the remaining eleven decisions:
- Introducer-present versus introducer-absent now partitions the two classification errors (1, 2).
- `/P ""` became a fifth error condition (4).
- `ProgramCommands` declared a copyable value type with no invariants; Dirnav holds a reference and Entry owns the instance for its lifetime (5).
- Dedup moved after the dot-strip (6); whitespace fixed as `std::isspace` in the C locale (7); the empty `/p` line keeps its trailing space (8).
- `usageLine()` and `helpText()` pinned verbatim (9).
- The code block gained `export module Cpp_TextFinder_Cmdline;` and named `Cpp_TextFinder_Cmdline.ixx` (10).
- Section 5 marked non-binding, with the §4 initializers as sole authority (11).
For item 12, renamed `Cpp_Structure.md` to [Cpp_TextFinder_Structure.md](../Cpp_TextFinder_Structure.md) with `git mv`; renamed the three libraries and their CMake targets to `Cpp_TextFinder_Cmdline`, `Cpp_TextFinder_Dirnav`, and `Cpp_TextFinder_Output`; repointed the structure doc's component links into the component subfolders; repaired the parent §2 and §8 links. Read "change target names to link form" as both the `Cpp_TextFinder_*` naming and the link repair. Prompts records kept their original prose, with only link targets repointed.
Flagged two judgment calls: the parent's `/h` routing change was phrased language-neutrally, naming `Cpp_TextFinder_Output` only as the C++ binding, because the parent governs four languages; and `Prompts_Cpp_Structure.md` and `Prompts_Fix_Cpp_Structure.md` were left unrenamed since only one file had been named.
---
## Turn 3
### User
> The combination of Spec_TextFinder.md and Spec_Cpp_TextFinder_Cmdline.md see quite complex for the relatively simple parser. Thinking carefully analyze these files to see if they can be simplified, perhaps by removing some of the spec details from the parent spec. Do not make any changes without my authorization.
### Assistant
Analyzed both — 295 lines of specification around roughly 60 lines of parser — and reported without editing.
Two findings beyond bulk:
- The `/p` dot-strip and empty-item rules change which files get searched, so parent §6 Consistency makes them binding on all four implementations, yet they lived only in the C++ spec.
- The previous turn's `/h` edit had put `Cpp_TextFinder_Output` into a language-neutral parent table.
Measured the duplication: the switch table existed four times (parent §5, the struct's field comments, this spec's §5 table, the verbatim help block); the `/P` accumulation rule was stated five times; the syntax rules twice.
Proposed seven cuts with line estimates — drop the verbatim help block, delete the §5 table, collapse the five-row error table, replace the eight procedural steps with four declarative rules, trim §3 and §11, drop dedup, and remove the parent's duplicate `/P` statements — projecting 295 lines down to about 213. Noted that pinning help text in the C++ spec looks like cross-language determinism but binds only C++, so the alternative to dropping it is moving it to the parent. Separately proposed dropping the `usageLine()` export by treating the malformed regex and output-construction failures as ordinary errors rather than usage diagnostics.
---
## Turn 4
### User
> implement all changes. move block to parent instead of dropping
### Assistant
Applied all seven cuts, both findings, and the `usageLine()` simplification.
- Parent gained [§5.1 Help Text](../../Spec_TextFinder.md) holding the verbatim block, parameterized on `<executable>` so it binds every implementation. The `/p` row absorbed the trim, dot-strip, and empty-item rules; the `/h` row lost the C++ type name; the duplicate `/P` statements in §3.2 and §4 were removed, the quoting paragraph compressed, and §4's restatement of "every switch has a default" dropped.
- This spec lost its §5 table — the struct's field comments carry the mapping and its initializers the defaults. The eight-step algorithm became four declarative rules, the five-row error table became one paragraph, normalization became two sentences with dedup dropped, and §3 and §11 were cut to four bullets each. Sections renumbered 1–10.
- Entry dropped `usageLine()` from the interface: a parse failure wrote the diagnostic the library had composed, while the malformed regex and output-construction failures wrote plain reason lines.
Result: 295 lines to 245, with the switch table down from four copies to two. Noted that diagnostic wording was now deliberately unfixed, and that making it byte-identical would mean moving it to the parent alongside §5.1.
---
## Turn 5
### User
> yes, make them byte-identical
### Assistant
Added [§5.2 Usage Diagnostics](../../Spec_TextFinder.md) to the parent: a six-row table of exact reason lines, with the format fixed as reason line + newline + the §5.1 usage line. Parent §3.4 and §4 now point at it instead of re-enumerating conditions.
This forced a reversal of the previous turn's simplification for one case. Once the reason lines are byte-fixed cross-language, `invalid regex for switch: /r` belongs in the same table as the other five — it complains about what the user typed — so a malformed regex became a full usage diagnostic again and `usageLine()` was re-exported, with a real caller in Entry §4 step 6. Regex compilation happens in Dirnav rather than the library, so §6 records that the library owns rows 1–5 and Entry composes row 6 from the same table.
`cannot initialize output` stayed out of the table and remains a bare line: it reports a runtime failure, not a bad command line. Its wording is fixed in the Entry spec, which binds C++ only.
Totals: parent 143 to 158 lines, this spec unchanged at 103, Entry 72.
---
## Turn 6
### User
> create Prompts_Spec_Cpp_TextFinder_Cmdline.md containing the first two prompts in today's conversation
### Assistant
Created [Prompts_Spec_Cpp_TextFinder_Cmdline.md](Prompts_Spec_Cpp_TextFinder_Cmdline.md) covering the two turns that produced the initial draft, and added it to [Project_Tree.md](../../Project_Tree.md). Noted that the library was named `Cpp_Cmdline` during those turns, and that the section list recorded there describes the spec as it stood at that point — several parts have since changed.
---
## Turn 7
### User
> create Prompts_Fix_Spec_Cpp_TextFinder_Cmdline.md containing the remaining prompts and replies
### Assistant
Created this file, [Prompts_Fix_Spec_Cpp_TextFinder_Cmdline.md](Prompts_Fix_Spec_Cpp_TextFinder_Cmdline.md), documenting the twelve-item review, the decisions applied, the renames, the complexity analysis, the seven cuts, and the byte-identical diagnostics. User prompts are quoted verbatim. Assistant replies are summarized from the actual responses; tool calls are noted as effects rather than transcribed.