Usability pass: tool registry, TUI polish, saved keys and settings
Tools - Table-driven tool registry with permission classes and default/minimal profiles; new tools: edit_file, list_dir, glob, grep, delete_file, move_file, todo_write, web_fetch, ask_user (plus read_file paging). - Built-in Myers diff; write tools return unified diffs. - Persistent permission rules (.agent/permissions.json), per-turn undo snapshots (.agent/undo), AGENTS.md project notes, auto-compact at 80% of the model context, cancellable run_shell with process-group kill. TUI - Table-driven slash commands: /provider /key /effort /status /tools /permissions /yolo /undo /retry /diff /export /copy /rename /delete /init /max-steps /todo, with / and @ completion. - Permission modal with diff and prefix rules, ask_user modal, todo panel, header with model/effort/context, bracketed paste, line editing, wide-char cursor, NO_COLOR and ASCII fallback; Esc never quits. Startup and configuration - API keys are entered in the TUI (hidden) and saved per provider in <config>/credentials (0600); env variables are only a fallback. - Last provider, per-provider model and reasoning effort are remembered in <config>/settings.json; --effort/-e and /effort send reasoning_effort (low|medium|high|max) to models that accept it. - DeepSeek preset uses deepseek-flash / deepseek-v4-pro. - Session flags --new/--continue/--resume/--list-sessions, --yolo, --confirm. Compatibility and tests - ncurses detection, macOS/Homebrew support, make install, XDG config dir, POSIX cleanups; Gitea CI (gcc/clang/asan/musl/macOS). - Unit tests for diff, fs tools, registry, undo/perms and config; e2e fixtures multi_file_refactor and ask_or_todo; vendored cJSON.
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WHC
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#ifndef _DEFAULT_SOURCE
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#define _DEFAULT_SOURCE
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#endif
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#include "cst_agent.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#define CHECK(c) \
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do { \
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if (!(c)) { \
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fprintf(stderr, "%s:%d: CHECK(%s) failed\n", __FILE__, __LINE__, #c); \
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exit(1); \
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} \
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} while (0)
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static char g_dir[256];
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static void write_file(const char *name, const char *text) {
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char path[512];
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snprintf(path, sizeof(path), "%s/cst-agent/%s", g_dir, name);
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FILE *fp = fopen(path, "w");
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CHECK(fp);
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fputs(text, fp);
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fclose(fp);
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}
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static void test_creds(void) {
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char key[512];
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const char *from = NULL;
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CHECK(cst_creds_resolve("deepseek", key, sizeof(key), &from) != 0);
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/* legacy single-key file follows its api_base */
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write_file("credentials", "api_key=sk-legacy\n"
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"api_base=https://api.minimax.cn/v1/\n");
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CHECK(cst_creds_load("minimax", key, sizeof(key)) == 0);
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CHECK(strcmp(key, "sk-legacy") == 0);
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CHECK(cst_creds_load("deepseek", key, sizeof(key)) != 0);
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write_file("credentials", "api_key=sk-old\n");
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CHECK(cst_creds_load("minimax", key, sizeof(key)) == 0);
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CHECK(cst_creds_load("openai", key, sizeof(key)) != 0);
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CHECK(cst_creds_save("deepseek", "sk-ds-1") == 0);
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CHECK(cst_creds_save("openai", "sk-oa") == 0);
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CHECK(cst_creds_save("deepseek", "sk-ds-2") == 0);
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CHECK(cst_creds_load("deepseek", key, sizeof(key)) == 0);
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CHECK(strcmp(key, "sk-ds-2") == 0);
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CHECK(cst_creds_load("openai", key, sizeof(key)) == 0);
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CHECK(strcmp(key, "sk-oa") == 0);
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CHECK(cst_creds_load("minimax", key, sizeof(key)) == 0); /* legacy kept */
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CHECK(strcmp(key, "sk-old") == 0);
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CHECK(cst_creds_save("deepseek", "bad\nkey") != 0);
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char path[512];
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snprintf(path, sizeof(path), "%s/cst-agent/credentials", g_dir);
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struct stat st;
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CHECK(stat(path, &st) == 0);
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CHECK((st.st_mode & 0077) == 0);
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CHECK(cst_creds_resolve("deepseek", key, sizeof(key), &from) == 0);
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CHECK(strcmp(from, "saved") == 0);
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setenv("MINIMAX_API_KEY", "sk-env", 1);
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unlink(path);
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CHECK(cst_creds_resolve("minimax", key, sizeof(key), &from) == 0);
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CHECK(strcmp(key, "sk-env") == 0 && strcmp(from, "MINIMAX_API_KEY") == 0);
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unsetenv("MINIMAX_API_KEY");
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}
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static void test_settings(void) {
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cst_settings_t s;
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CHECK(cst_settings_load(&s) != 0);
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CHECK(cst_settings_model(&s, "deepseek") == NULL);
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cst_agent_config_t cfg;
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memset(&cfg, 0, sizeof(cfg));
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snprintf(cfg.provider, sizeof(cfg.provider), "deepseek");
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snprintf(cfg.model, sizeof(cfg.model), "deepseek-v4-pro");
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snprintf(cfg.effort, sizeof(cfg.effort), "high");
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CHECK(cst_settings_remember(&cfg) == 0);
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snprintf(cfg.provider, sizeof(cfg.provider), "openai");
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snprintf(cfg.model, sizeof(cfg.model), "gpt-5");
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snprintf(cfg.effort, sizeof(cfg.effort), "max");
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CHECK(cst_settings_remember(&cfg) == 0);
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CHECK(cst_settings_load(&s) == 0);
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CHECK(strcmp(s.provider, "openai") == 0);
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CHECK(strcmp(s.effort, "max") == 0);
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CHECK(strcmp(cst_settings_model(&s, "deepseek"), "deepseek-v4-pro") == 0);
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CHECK(strcmp(cst_settings_model(&s, "openai"), "gpt-5") == 0);
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CHECK(s.nmodels == 2);
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write_file("settings.json", "{not json");
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CHECK(cst_settings_load(&s) != 0);
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CHECK(s.provider[0] == 0);
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}
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static void test_effort(void) {
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CHECK(cst_effort_valid("low") && cst_effort_valid("max"));
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CHECK(!cst_effort_valid("ultra") && !cst_effort_valid(NULL));
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CHECK(strcmp(cst_effort_wire("deepseek", "deepseek-flash", "max"), "max") ==
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0);
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CHECK(strcmp(cst_effort_wire("openai", "o3-mini", "max"), "high") == 0);
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CHECK(cst_effort_wire("openai", "gpt-4.1-mini", "high") == NULL);
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CHECK(cst_effort_wire("minimax", "MiniMax-M2.7", "high") == NULL);
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cst_message_t m = {0};
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m.role = CST_ROLE_USER;
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m.content = "hi";
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cst_llm_request_t req = {0};
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req.model = "deepseek-flash";
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req.msgs = &m;
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req.nmsgs = 1;
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char *body = cst_llm_build_body(&req);
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CHECK(body && !strstr(body, "reasoning_effort"));
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free(body);
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req.reasoning_effort = "high";
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body = cst_llm_build_body(&req);
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CHECK(body && strstr(body, "\"reasoning_effort\":\"high\""));
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free(body);
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}
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int main(void) {
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snprintf(g_dir, sizeof(g_dir), "/tmp/cst-config-XXXXXX");
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CHECK(mkdtemp(g_dir));
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setenv("XDG_CONFIG_HOME", g_dir, 1);
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unsetenv("DEEPSEEK_API_KEY");
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unsetenv("MINIMAX_API_KEY");
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unsetenv("OPENAI_API_KEY");
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char sub[300];
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snprintf(sub, sizeof(sub), "%s/cst-agent", g_dir);
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CHECK(mkdir(sub, 0700) == 0);
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test_creds();
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test_settings();
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test_effort();
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char cmd[400];
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snprintf(cmd, sizeof(cmd), "rm -rf '%s'", g_dir);
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CHECK(system(cmd) == 0);
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printf("test_config: OK\n");
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return 0;
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}
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